Vulnerability-Lookup

CVE-2026-74518 (GCVE-0-2026-74518)

Vulnerability from cvelistv5 – Published: 2026-08-15 12:27 – Updated: 2026-08-19 16:38

Title

mm/hugetlb: fix list corruption in allocate_file_region_entries()

Summary

In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: fix list corruption in allocate_file_region_entries() allocate_file_region_entries() tops up resv->region_cache with freshly allocated file_region descriptors. The allocation uses GFP_KERNEL, so resv->lock is dropped around it: the new entries are gathered on a stack-local list head, allocated_regions, and spliced into resv->region_cache once the lock is re-acquired. The splice used list_splice(), which moves the entries but does not re-initialize the source head, so allocated_regions is left pointing at an entry that now lives on resv->region_cache. The top-up runs in a while loop that re-checks the cache deficit after re-acquiring the lock. For a shared mapping the resv_map is shared by every mapper of the hugetlbfs inode, so a concurrent region_chg()/region_add()/region_del() on the same resv_map can consume cache entries during the unlocked window and force a second iteration. That iteration calls list_add() on the stale head and corrupts the list; with CONFIG_DEBUG_LIST the __list_add_valid() check trips: list_add corruption. next->prev should be prev (ffffc900011ff7f8), but was ffff88814c281460. (next=ffff88814c545640). kernel BUG at lib/list_debug.c:31! allocate_file_region_entries+0x191/0x420 region_chg+0x267/0x300 hugetlb_reserve_pages+0x387/0xc80 hugetlbfs_file_mmap+0x2ce/0x3f0 mmap_region+0x1348/0x1a80 do_mmap+0x85e/0xb90 vm_mmap_pgoff+0x18c/0x330 ksys_mmap_pgoff+0x2a1/0x3e0 do_syscall_64+0xd7/0x420 Without CONFIG_DEBUG_LIST the bad list_add() silently links a kernel-stack address into resv->region_cache, leading to later use-after-free. This was observed as a real host panic on a dense KVM host where a QEMU guest-RAM hugetlbfs file was mapped MAP_SHARED by both QEMU and a separate SPDK/DPDK vhost-user target, generating concurrent region_* traffic on one shared resv_map. Use list_splice_init() so the source head is re-initialized empty after each splice, making the retry loop safe.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/01b8569233e47693d…
https://git.kernel.org/stable/c/9c5fdffc5e1ce8440…
https://git.kernel.org/stable/c/f3e54f6a5e1681f83…
https://git.kernel.org/stable/c/62e1c2741a4d923d9…
https://git.kernel.org/stable/c/587a0accc2b4fccc5…
https://git.kernel.org/stable/c/126a70bf1a08ddc9d…
https://git.kernel.org/stable/c/ac1bb7fd45088d0db…
https://git.kernel.org/stable/c/dd9623f58ec702a07…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: d3ec7b6e09e512ba902b86bcca2c512fb06d492f , < 01b8569233e47693d6ff7efa96d9854c55f936fc (git) Affected: d3ec7b6e09e512ba902b86bcca2c512fb06d492f , < 9c5fdffc5e1ce84403c58289ee72697051803bf7 (git) Affected: d3ec7b6e09e512ba902b86bcca2c512fb06d492f , < f3e54f6a5e1681f83d13e8716bc92ef5ecf121d3 (git) Affected: d3ec7b6e09e512ba902b86bcca2c512fb06d492f , < 62e1c2741a4d923d9854efd5927a6212aad7a187 (git) Affected: d3ec7b6e09e512ba902b86bcca2c512fb06d492f , < 587a0accc2b4fccc5cf7baf0fe34e50efde51f9c (git) Affected: d3ec7b6e09e512ba902b86bcca2c512fb06d492f , < 126a70bf1a08ddc9d79c471ebdaa2b08cfbab8df (git) Affected: d3ec7b6e09e512ba902b86bcca2c512fb06d492f , < ac1bb7fd45088d0db57a22ce7729f258ebd63cf5 (git) Affected: d3ec7b6e09e512ba902b86bcca2c512fb06d492f , < dd9623f58ec702a07b2d67179d6fcea79c52231a (git)	guessed
Linux	Linux	Affected: 5.10 Unaffected: 0 , < 5.10 (semver) Unaffected: 5.10.265 , ≤ 5.10.* (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.151 , ≤ 6.6.* (semver) Unaffected: 6.12.103 , ≤ 6.12.* (semver) Unaffected: 6.18.44 , ≤ 6.18.* (semver) Unaffected: 7.1.8 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/hugetlb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "01b8569233e47693d6ff7efa96d9854c55f936fc",
              "status": "affected",
              "version": "d3ec7b6e09e512ba902b86bcca2c512fb06d492f",
              "versionType": "git"
            },
            {
              "lessThan": "9c5fdffc5e1ce84403c58289ee72697051803bf7",
              "status": "affected",
              "version": "d3ec7b6e09e512ba902b86bcca2c512fb06d492f",
              "versionType": "git"
            },
            {
              "lessThan": "f3e54f6a5e1681f83d13e8716bc92ef5ecf121d3",
              "status": "affected",
              "version": "d3ec7b6e09e512ba902b86bcca2c512fb06d492f",
              "versionType": "git"
            },
            {
              "lessThan": "62e1c2741a4d923d9854efd5927a6212aad7a187",
              "status": "affected",
              "version": "d3ec7b6e09e512ba902b86bcca2c512fb06d492f",
              "versionType": "git"
            },
            {
              "lessThan": "587a0accc2b4fccc5cf7baf0fe34e50efde51f9c",
              "status": "affected",
              "version": "d3ec7b6e09e512ba902b86bcca2c512fb06d492f",
              "versionType": "git"
            },
            {
              "lessThan": "126a70bf1a08ddc9d79c471ebdaa2b08cfbab8df",
              "status": "affected",
              "version": "d3ec7b6e09e512ba902b86bcca2c512fb06d492f",
              "versionType": "git"
            },
            {
              "lessThan": "ac1bb7fd45088d0db57a22ce7729f258ebd63cf5",
              "status": "affected",
              "version": "d3ec7b6e09e512ba902b86bcca2c512fb06d492f",
              "versionType": "git"
            },
            {
              "lessThan": "dd9623f58ec702a07b2d67179d6fcea79c52231a",
              "status": "affected",
              "version": "d3ec7b6e09e512ba902b86bcca2c512fb06d492f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "mm/hugetlb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.10"
            },
            {
              "lessThan": "5.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.151",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.103",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.265",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.216",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.183",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.151",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.103",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.44",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.8",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/hugetlb: fix list corruption in allocate_file_region_entries()\n\nallocate_file_region_entries() tops up resv-\u003eregion_cache with freshly\nallocated file_region descriptors.  The allocation uses GFP_KERNEL, so\nresv-\u003elock is dropped around it: the new entries are gathered on a\nstack-local list head, allocated_regions, and spliced into\nresv-\u003eregion_cache once the lock is re-acquired.\n\nThe splice used list_splice(), which moves the entries but does not\nre-initialize the source head, so allocated_regions is left pointing at an\nentry that now lives on resv-\u003eregion_cache.  The top-up runs in a while\nloop that re-checks the cache deficit after re-acquiring the lock.  For a\nshared mapping the resv_map is shared by every mapper of the hugetlbfs\ninode, so a concurrent region_chg()/region_add()/region_del() on the same\nresv_map can consume cache entries during the unlocked window and force a\nsecond iteration.  That iteration calls list_add() on the stale head and\ncorrupts the list; with CONFIG_DEBUG_LIST the __list_add_valid() check\ntrips:\n\n  list_add corruption. next-\u003eprev should be prev (ffffc900011ff7f8),\n  but was ffff88814c281460. (next=ffff88814c545640).\n  kernel BUG at lib/list_debug.c:31!\n   allocate_file_region_entries+0x191/0x420\n   region_chg+0x267/0x300\n   hugetlb_reserve_pages+0x387/0xc80\n   hugetlbfs_file_mmap+0x2ce/0x3f0\n   mmap_region+0x1348/0x1a80\n   do_mmap+0x85e/0xb90\n   vm_mmap_pgoff+0x18c/0x330\n   ksys_mmap_pgoff+0x2a1/0x3e0\n   do_syscall_64+0xd7/0x420\n\nWithout CONFIG_DEBUG_LIST the bad list_add() silently links a kernel-stack\naddress into resv-\u003eregion_cache, leading to later use-after-free.\n\nThis was observed as a real host panic on a dense KVM host where a QEMU\nguest-RAM hugetlbfs file was mapped MAP_SHARED by both QEMU and a separate\nSPDK/DPDK vhost-user target, generating concurrent region_* traffic on one\nshared resv_map.\n\nUse list_splice_init() so the source head is re-initialized empty after\neach splice, making the retry loop safe."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is reached only through local hugetlb reservation paths (mmap/memfd_create/fault syscalls into region_chg/region_add/region_del); no network protocol or remote packet handler invokes allocate_file_region_entries().\nAC:L - Exploitation needs a race while resv-\u003elock is dropped during GFP_KERNEL allocation, but an attacker can spawn concurrent MAP_SHARED mappers/faulters on one hugetlb inode and controls both sides of that race.\nPR:L - Unprivileged local users can trigger this via memfd_create(MFD_HUGETLB) plus MAP_SHARED mmap/fault activity, or by mapping accessible shared hugetlbfs files, without init-namespace root or special capabilities.\nUI:N - No victim interaction is required; the attacker drives the needed concurrent syscalls and shared hugetlb mappings themselves to hit the corrupted list splice retry path.\nS:U - Impact is kernel hugetlb resv_map list/memory corruption on the host; it does not by itself cross a VM, IOMMU, or separate security-authority boundary even though KVM/DPDK hosts are a prime deployment.\nC:H - Without CONFIG_DEBUG_LIST, stale list_splice leaves a kernel-stack pointer in resv-\u003eregion_cache, producing later use-after-free that can be turned into arbitrary kernel memory read/disclosure primitives.\nI:H - Corrupted region_cache pointers let subsequent region_add/region_del/cache operations write through attacker-influenced list links, enabling heap metadata corruption and potential arbitrary kernel write or code execution.\nA:H - Real host panics were reported on dense KVM hugetlb workloads; DEBUG_LIST kernels BUG on list_add corruption, and default builds can crash from UAF while walking the poisoned region_cache."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:38:19.402Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/01b8569233e47693d6ff7efa96d9854c55f936fc"
        },
        {
          "url": "https://git.kernel.org/stable/c/9c5fdffc5e1ce84403c58289ee72697051803bf7"
        },
        {
          "url": "https://git.kernel.org/stable/c/f3e54f6a5e1681f83d13e8716bc92ef5ecf121d3"
        },
        {
          "url": "https://git.kernel.org/stable/c/62e1c2741a4d923d9854efd5927a6212aad7a187"
        },
        {
          "url": "https://git.kernel.org/stable/c/587a0accc2b4fccc5cf7baf0fe34e50efde51f9c"
        },
        {
          "url": "https://git.kernel.org/stable/c/126a70bf1a08ddc9d79c471ebdaa2b08cfbab8df"
        },
        {
          "url": "https://git.kernel.org/stable/c/ac1bb7fd45088d0db57a22ce7729f258ebd63cf5"
        },
        {
          "url": "https://git.kernel.org/stable/c/dd9623f58ec702a07b2d67179d6fcea79c52231a"
        }
      ],
      "title": "mm/hugetlb: fix list corruption in allocate_file_region_entries()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74518",
    "datePublished": "2026-08-15T12:27:37.480Z",
    "dateReserved": "2026-08-15T05:44:03.910Z",
    "dateUpdated": "2026-08-19T16:38:19.402Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-74518",
      "date": "2026-09-29",
      "epss": "0.00126",
      "percentile": "0.01927"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-25T02:03:38.000Z",
      "cve": "CVE-2026-74518",
      "id": "msrc_CVE-2026-74518",
      "initial_release_date": "2026-08-23T14:56:12.000Z",
      "product_status:fixed": "1",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "mm/hugetlb: fix list corruption in allocate_file_region_entries()",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-74518.json",
      "version": "3"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "mm/hugetlb.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "01b8569233e47693d6ff7efa96d9854c55f936fc",
                    "status": "affected",
                    "version": "d3ec7b6e09e512ba902b86bcca2c512fb06d492f",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "9c5fdffc5e1ce84403c58289ee72697051803bf7",
                    "status": "affected",
                    "version": "d3ec7b6e09e512ba902b86bcca2c512fb06d492f",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "f3e54f6a5e1681f83d13e8716bc92ef5ecf121d3",
                    "status": "affected",
                    "version": "d3ec7b6e09e512ba902b86bcca2c512fb06d492f",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "62e1c2741a4d923d9854efd5927a6212aad7a187",
                    "status": "affected",
                    "version": "d3ec7b6e09e512ba902b86bcca2c512fb06d492f",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "587a0accc2b4fccc5cf7baf0fe34e50efde51f9c",
                    "status": "affected",
                    "version": "d3ec7b6e09e512ba902b86bcca2c512fb06d492f",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "126a70bf1a08ddc9d79c471ebdaa2b08cfbab8df",
                    "status": "affected",
                    "version": "d3ec7b6e09e512ba902b86bcca2c512fb06d492f",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "ac1bb7fd45088d0db57a22ce7729f258ebd63cf5",
                    "status": "affected",
                    "version": "d3ec7b6e09e512ba902b86bcca2c512fb06d492f",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "dd9623f58ec702a07b2d67179d6fcea79c52231a",
                    "status": "affected",
                    "version": "d3ec7b6e09e512ba902b86bcca2c512fb06d492f",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "mm/hugetlb.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "5.10"
                  },
                  {
                    "lessThan": "5.10",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.10.*",
                    "status": "unaffected",
                    "version": "5.10.265",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.15.*",
                    "status": "unaffected",
                    "version": "5.15.216",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.183",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.151",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.103",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.44",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "7.1.*",
                    "status": "unaffected",
                    "version": "7.1.8",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "7.2",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/hugetlb: fix list corruption in allocate_file_region_entries()\n\nallocate_file_region_entries() tops up resv-\u003eregion_cache with freshly\nallocated file_region descriptors.  The allocation uses GFP_KERNEL, so\nresv-\u003elock is dropped around it: the new entries are gathered on a\nstack-local list head, allocated_regions, and spliced into\nresv-\u003eregion_cache once the lock is re-acquired.\n\nThe splice used list_splice(), which moves the entries but does not\nre-initialize the source head, so allocated_regions is left pointing at an\nentry that now lives on resv-\u003eregion_cache.  The top-up runs in a while\nloop that re-checks the cache deficit after re-acquiring the lock.  For a\nshared mapping the resv_map is shared by every mapper of the hugetlbfs\ninode, so a concurrent region_chg()/region_add()/region_del() on the same\nresv_map can consume cache entries during the unlocked window and force a\nsecond iteration.  That iteration calls list_add() on the stale head and\ncorrupts the list; with CONFIG_DEBUG_LIST the __list_add_valid() check\ntrips:\n\n  list_add corruption. next-\u003eprev should be prev (ffffc900011ff7f8),\n  but was ffff88814c281460. (next=ffff88814c545640).\n  kernel BUG at lib/list_debug.c:31!\n   allocate_file_region_entries+0x191/0x420\n   region_chg+0x267/0x300\n   hugetlb_reserve_pages+0x387/0xc80\n   hugetlbfs_file_mmap+0x2ce/0x3f0\n   mmap_region+0x1348/0x1a80\n   do_mmap+0x85e/0xb90\n   vm_mmap_pgoff+0x18c/0x330\n   ksys_mmap_pgoff+0x2a1/0x3e0\n   do_syscall_64+0xd7/0x420\n\nWithout CONFIG_DEBUG_LIST the bad list_add() silently links a kernel-stack\naddress into resv-\u003eregion_cache, leading to later use-after-free.\n\nThis was observed as a real host panic on a dense KVM host where a QEMU\nguest-RAM hugetlbfs file was mapped MAP_SHARED by both QEMU and a separate\nSPDK/DPDK vhost-user target, generating concurrent region_* traffic on one\nshared resv_map.\n\nUse list_splice_init() so the source head is re-initialized empty after\neach splice, making the retry loop safe."
          }
        ],
        "id": "CVE-2026-74518",
        "lastModified": "2026-08-19T17:21:08.543",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-08-15T13:17:56.967",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/01b8569233e47693d6ff7efa96d9854c55f936fc"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/126a70bf1a08ddc9d79c471ebdaa2b08cfbab8df"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/587a0accc2b4fccc5cf7baf0fe34e50efde51f9c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/62e1c2741a4d923d9854efd5927a6212aad7a187"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/9c5fdffc5e1ce84403c58289ee72697051803bf7"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/ac1bb7fd45088d0db57a22ce7729f258ebd63cf5"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/dd9623f58ec702a07b2d67179d6fcea79c52231a"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/f3e54f6a5e1681f83d13e8716bc92ef5ecf121d3"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-09-24T03:32:07+00:00",
      "cve": "CVE-2026-74518",
      "id": "CVE-2026-74518",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:fixed": "612",
      "product_status:known_affected": "22",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mm/hugetlb: fix list corruption in allocate_file_region_entries()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74518.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-24T16:29:14Z",
      "cve": "CVE-2026-74518",
      "id": "CVE-2026-74518",
      "initial_release_date": "2026-08-15T23:51:08Z",
      "product_status:first_fixed": "164",
      "product_status:known_affected": "522",
      "product_status:known_not_affected": "143",
      "product_status:recommended": "259",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-74518",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-74518.json",
      "version": "15"
    }
  }
}

GHSA-9V2F-674J-MRJW

Vulnerability from github – Published: 2026-08-15 15:30 – Updated: 2026-08-19 18:32

Details

In the Linux kernel, the following vulnerability has been resolved:

mm/hugetlb: fix list corruption in allocate_file_region_entries()

allocate_file_region_entries() tops up resv->region_cache with freshly allocated file_region descriptors. The allocation uses GFP_KERNEL, so resv->lock is dropped around it: the new entries are gathered on a stack-local list head, allocated_regions, and spliced into resv->region_cache once the lock is re-acquired.

The splice used list_splice(), which moves the entries but does not re-initialize the source head, so allocated_regions is left pointing at an entry that now lives on resv->region_cache. The top-up runs in a while loop that re-checks the cache deficit after re-acquiring the lock. For a shared mapping the resv_map is shared by every mapper of the hugetlbfs inode, so a concurrent region_chg()/region_add()/region_del() on the same resv_map can consume cache entries during the unlocked window and force a second iteration. That iteration calls list_add() on the stale head and corrupts the list; with CONFIG_DEBUG_LIST the __list_add_valid() check trips:

list_add corruption. next->prev should be prev (ffffc900011ff7f8), but was ffff88814c281460. (next=ffff88814c545640). kernel BUG at lib/list_debug.c:31! allocate_file_region_entries+0x191/0x420 region_chg+0x267/0x300 hugetlb_reserve_pages+0x387/0xc80 hugetlbfs_file_mmap+0x2ce/0x3f0 mmap_region+0x1348/0x1a80 do_mmap+0x85e/0xb90 vm_mmap_pgoff+0x18c/0x330 ksys_mmap_pgoff+0x2a1/0x3e0 do_syscall_64+0xd7/0x420

Without CONFIG_DEBUG_LIST the bad list_add() silently links a kernel-stack address into resv->region_cache, leading to later use-after-free.

This was observed as a real host panic on a dense KVM host where a QEMU guest-RAM hugetlbfs file was mapped MAP_SHARED by both QEMU and a separate SPDK/DPDK vhost-user target, generating concurrent region_* traffic on one shared resv_map.

Use list_splice_init() so the source head is re-initialized empty after each splice, making the retry loop safe.

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-74518"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T13:17:56Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/hugetlb: fix list corruption in allocate_file_region_entries()\n\nallocate_file_region_entries() tops up resv-\u003eregion_cache with freshly\nallocated file_region descriptors.  The allocation uses GFP_KERNEL, so\nresv-\u003elock is dropped around it: the new entries are gathered on a\nstack-local list head, allocated_regions, and spliced into\nresv-\u003eregion_cache once the lock is re-acquired.\n\nThe splice used list_splice(), which moves the entries but does not\nre-initialize the source head, so allocated_regions is left pointing at an\nentry that now lives on resv-\u003eregion_cache.  The top-up runs in a while\nloop that re-checks the cache deficit after re-acquiring the lock.  For a\nshared mapping the resv_map is shared by every mapper of the hugetlbfs\ninode, so a concurrent region_chg()/region_add()/region_del() on the same\nresv_map can consume cache entries during the unlocked window and force a\nsecond iteration.  That iteration calls list_add() on the stale head and\ncorrupts the list; with CONFIG_DEBUG_LIST the __list_add_valid() check\ntrips:\n\n  list_add corruption. next-\u003eprev should be prev (ffffc900011ff7f8),\n  but was ffff88814c281460. (next=ffff88814c545640).\n  kernel BUG at lib/list_debug.c:31!\n   allocate_file_region_entries+0x191/0x420\n   region_chg+0x267/0x300\n   hugetlb_reserve_pages+0x387/0xc80\n   hugetlbfs_file_mmap+0x2ce/0x3f0\n   mmap_region+0x1348/0x1a80\n   do_mmap+0x85e/0xb90\n   vm_mmap_pgoff+0x18c/0x330\n   ksys_mmap_pgoff+0x2a1/0x3e0\n   do_syscall_64+0xd7/0x420\n\nWithout CONFIG_DEBUG_LIST the bad list_add() silently links a kernel-stack\naddress into resv-\u003eregion_cache, leading to later use-after-free.\n\nThis was observed as a real host panic on a dense KVM host where a QEMU\nguest-RAM hugetlbfs file was mapped MAP_SHARED by both QEMU and a separate\nSPDK/DPDK vhost-user target, generating concurrent region_* traffic on one\nshared resv_map.\n\nUse list_splice_init() so the source head is re-initialized empty after\neach splice, making the retry loop safe.",
  "id": "GHSA-9v2f-674j-mrjw",
  "modified": "2026-08-19T18:32:29Z",
  "published": "2026-08-15T15:30:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74518"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/01b8569233e47693d6ff7efa96d9854c55f936fc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/126a70bf1a08ddc9d79c471ebdaa2b08cfbab8df"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/587a0accc2b4fccc5cf7baf0fe34e50efde51f9c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/62e1c2741a4d923d9854efd5927a6212aad7a187"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9c5fdffc5e1ce84403c58289ee72697051803bf7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ac1bb7fd45088d0db57a22ce7729f258ebd63cf5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd9623f58ec702a07b2d67179d6fcea79c52231a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f3e54f6a5e1681f83d13e8716bc92ef5ecf121d3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

MSRC_CVE-2026-74518

Vulnerability from csaf_microsoft - Published: 2026-08-23 14:56 - Updated: 2026-09-25 02:03

Summary

mm/hugetlb: fix list corruption in allocate_file_region_entries()

Scope

1 vulnerability in this advisory, including CVE-2026-74518.

CVE-2026-74518

7.8 (High)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Fixed: 1 product Known affected: 1 product

https://learn.microsoft.com/en-us/azure/azure-linux/tutoria…

Open the full advisory

OPENSUSE-SU-2026:21910-1

Vulnerability from csaf_opensuse - Published: 2026-09-22 15:26 - Updated: 2026-09-29 08:23

Summary

Security update for the Linux Kernel

Severity

Important

Scope

885 vulnerabilities in this advisory, including CVE-2026-74518.

CVE-2026-74518

7 (High)


                
                  CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Recommended: 136 products

Open the full advisory

RHSA-2026:70459

Vulnerability from csaf_opensuse - Published: 2026-09-23 22:26 - Updated: 2026-09-28 15:31

Summary

Red Hat Security Advisory: kernel security, bug fix, and enhancement update

Severity

Important

Scope

13 vulnerabilities in this advisory, including CVE-2026-74518.

CVE-2026-74518

A flaw was found in the Linux kernel. The allocate_file_region_entries() function, responsible for managing huge page memory regions, can suffer from list corruption. This occurs because the list_splice() operation does not properly re-initialize a list head, allowing concurrent access to shared memory maps to corrupt the internal data structure. An attacker could exploit this to cause a kernel panic, leading to a Denial of Service, or potentially a use-after-free condition.

7.8 (High)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Fixed: 303 products

https://access.redhat.com/errata/RHSA-2026:70459

Open the full advisory

RHSA-2026:70498

Vulnerability from csaf_redhat - Published: 2026-09-23 05:09 - Updated: 2026-09-28 15:31

Summary

Red Hat Security Advisory: kernel security, bug fix, and enhancement update

Severity

Important

Scope

12 vulnerabilities in this advisory, including CVE-2026-74518.

CVE-2026-74518

7.8 (High)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Fixed: 309 products

https://access.redhat.com/errata/RHSA-2026:70498

Open the full advisory

RLSA-2026:70459 (CVE-2025-39964)

Vulnerability from osv_rocky – Published: 2026-09-24 18:05 – Updated: 2026-09-30 06:15 – Source website

Summary

Important: kernel security, bug fix, and enhancement update

Details

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

kernel: crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg (CVE-2025-39964)
kernel: iommu/vt-d: Clear Present bit before tearing down PASID entry (CVE-2026-45894)
kernel: crypto: ccp - Fix a crash due to incorrect cleanup usage of kfree (CVE-2026-45959)
kernel: dm cache policy smq: fix missing locks in invalidating cache blocks (CVE-2026-53062)
kernel: keys: Pin request_key_auth payload in instantiate paths (CVE-2026-63823)
kernel: net/mlx5: Fix MCIA register buffer overflow on 32 dword reads (CVE-2026-68293)
kernel: Linux kernel: libceph null pointer dereference leads to denial of service (CVE-2026-68157)
kernel: Linux kernel Bluetooth RFCOMM: Denial of Service via use-after-free in set_termios (CVE-2026-68188)
kernel: libceph: refresh auth->authorizer_buf{,_len} after authorizer update (CVE-2026-68156)
kernel: Linux kernel (libceph): Denial of Service due to malformed monitor maps (CVE-2026-68155)
kernel: Bluetooth: mgmt: hold reference for hci_conn in mgmt_pending_cmds (CVE-2026-68391)
kernel: net/mlx5e: macsec: fix use-after-free of metadata_dst on RX SC delete (CVE-2026-72072)
kernel: mm/hugetlb: fix list corruption in allocate_file_region_entries() (CVE-2026-74518)

Bug Fix(es) and Enhancement(s):

[Intel 9.8 FEAT] ice: Driver Update [rhel-9.8.z] (JIRA:Rocky Linux-213003)
Rocky Linux 9.8: Multiuser Kerberized DFS shares fail to mount with UID mount option [rhel-9.8.z] (JIRA:Rocky Linux-254108)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Severity

8.8 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Credits

Rocky Enterprise Software Foundation

Red Hat

References

URL

Type

	https://errata.rockylinux.org/RLSA-2026:70459	ADVISORY
	https://bugzilla.redhat.com/show_bug.cgi?id=2403545	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2481940	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2481948	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2492278	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2502218	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2513150	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2513212	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2513222	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2513232	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2513295	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2513453	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2516523	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2517004	REPORT
	https://access.redhat.com/errata/RHSA-2026:70459	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Rocky Linux:9",
        "name": "kernel",
        "purl": "pkg:rpm/rocky-linux/kernel?distro=rocky-linux-9\u0026epoch=0"
      },
      "ranges": [
        {
          "database_specific": {
            "yum_repository": "BaseOS"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0:5.14.0-687.50.1.el9_8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [
    {
      "name": "Rocky Enterprise Software Foundation"
    },
    {
      "name": "Red Hat"
    }
  ],
  "database_specific": {
    "license": "CC-BY-4.0",
    "license_url": "https://creativecommons.org/licenses/by/4.0/",
    "source_advisory": "RHSA-2026:70459"
  },
  "details": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg (CVE-2025-39964)\n\n* kernel: iommu/vt-d: Clear Present bit before tearing down PASID entry (CVE-2026-45894)\n\n* kernel: crypto: ccp - Fix a crash due to incorrect cleanup usage of kfree (CVE-2026-45959)\n\n* kernel: dm cache policy smq: fix missing locks in invalidating cache blocks (CVE-2026-53062)\n\n* kernel: keys: Pin request_key_auth payload in instantiate paths (CVE-2026-63823)\n\n* kernel: net/mlx5: Fix MCIA register buffer overflow on 32 dword reads (CVE-2026-68293)\n\n* kernel: Linux kernel: libceph null pointer dereference leads to denial of service (CVE-2026-68157)\n\n* kernel: Linux kernel Bluetooth RFCOMM: Denial of Service via use-after-free in set_termios (CVE-2026-68188)\n\n* kernel: libceph: refresh auth-\u003eauthorizer_buf{,_len} after authorizer update (CVE-2026-68156)\n\n* kernel: Linux kernel (libceph): Denial of Service due to malformed monitor maps (CVE-2026-68155)\n\n* kernel: Bluetooth: mgmt: hold reference for hci_conn in mgmt_pending_cmds (CVE-2026-68391)\n\n* kernel: net/mlx5e: macsec: fix use-after-free of metadata_dst on RX SC delete (CVE-2026-72072)\n\n* kernel: mm/hugetlb: fix list corruption in allocate_file_region_entries() (CVE-2026-74518)\n\nBug Fix(es) and Enhancement(s):\n\n* [Intel 9.8 FEAT] ice: Driver Update [rhel-9.8.z] (JIRA:Rocky Linux-213003)\n\n* Rocky Linux 9.8: Multiuser Kerberized DFS shares fail to mount with UID mount option [rhel-9.8.z] (JIRA:Rocky Linux-254108)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
  "id": "RLSA-2026:70459",
  "modified": "2026-09-30T06:15:28.827602Z",
  "published": "2026-09-24T18:05:00.461776Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLSA-2026:70459"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2403545"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2481940"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2481948"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492278"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502218"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513150"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513212"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513222"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513232"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513295"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513453"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516523"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517004"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:70459"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Important: kernel security, bug fix, and enhancement update",
  "upstream": [
    "CVE-2025-39964",
    "CVE-2026-45894",
    "CVE-2026-45959",
    "CVE-2026-53062",
    "CVE-2026-63823",
    "CVE-2026-68155",
    "CVE-2026-68156",
    "CVE-2026-68157",
    "CVE-2026-68188",
    "CVE-2026-68293",
    "CVE-2026-68391",
    "CVE-2026-72072",
    "CVE-2026-74518"
  ]
}

RLSA-2026:70498 (CVE-2025-39964)

Vulnerability from osv_rocky – Published: 2026-09-24 12:09 – Updated: 2026-09-30 06:15 – Source website

Summary

Important: kernel security, bug fix, and enhancement update

Details

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

kernel: crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg (CVE-2025-39964)
kernel: iommu/vt-d: Clear Present bit before tearing down PASID entry (CVE-2026-45894)
kernel: crypto: ccp - Fix a crash due to incorrect cleanup usage of kfree (CVE-2026-45959)
kernel: dm cache policy smq: fix missing locks in invalidating cache blocks (CVE-2026-53062)
kernel: keys: Pin request_key_auth payload in instantiate paths (CVE-2026-63823)
kernel: nvmet-tcp: check INIT_FAILED before nvmet_req_uninit in digest error path (CVE-2026-64534)
kernel: net/mlx5: Fix MCIA register buffer overflow on 32 dword reads (CVE-2026-68293)
kernel: Linux kernel: libceph stack out-of-bounds write via crafted OSDMap (CVE-2026-68159)
kernel: Linux kernel Bluetooth RFCOMM: Denial of Service via use-after-free in set_termios (CVE-2026-68188)
kernel: Linux kernel (libceph): Denial of Service due to malformed monitor maps (CVE-2026-68155)
kernel: Bluetooth: mgmt: hold reference for hci_conn in mgmt_pending_cmds (CVE-2026-68391)
kernel: mm/hugetlb: fix list corruption in allocate_file_region_entries() (CVE-2026-74518)

Bug Fix(es) and Enhancement(s):

Update kernel to use new certificate paths [rhel-10.2.z] (JIRA:Rocky Linux-169478)
RHIVOS - [backport] S32G Driver Enablement - PWM (JIRA:Rocky Linux-255517)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Severity

8.8 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Credits

Rocky Enterprise Software Foundation

Red Hat

References

URL

Type

	https://errata.rockylinux.org/RLSA-2026:70498	ADVISORY
	https://bugzilla.redhat.com/show_bug.cgi?id=2403545	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2481940	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2481948	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2492278	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2502218	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2507399	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2513150	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2513165	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2513222	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2513295	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2513453	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2517004	REPORT
	https://access.redhat.com/errata/RHSA-2026:70498	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Rocky Linux:10",
        "name": "kernel",
        "purl": "pkg:rpm/rocky-linux/kernel?distro=rocky-linux-10\u0026epoch=0"
      },
      "ranges": [
        {
          "database_specific": {
            "yum_repository": "BaseOS"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0:6.12.0-211.58.1.el10_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [
    {
      "name": "Rocky Enterprise Software Foundation"
    },
    {
      "name": "Red Hat"
    }
  ],
  "database_specific": {
    "license": "CC-BY-4.0",
    "license_url": "https://creativecommons.org/licenses/by/4.0/",
    "source_advisory": "RHSA-2026:70498"
  },
  "details": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg (CVE-2025-39964)\n\n* kernel: iommu/vt-d: Clear Present bit before tearing down PASID entry (CVE-2026-45894)\n\n* kernel: crypto: ccp - Fix a crash due to incorrect cleanup usage of kfree (CVE-2026-45959)\n\n* kernel: dm cache policy smq: fix missing locks in invalidating cache blocks (CVE-2026-53062)\n\n* kernel: keys: Pin request_key_auth payload in instantiate paths (CVE-2026-63823)\n\n* kernel: nvmet-tcp: check INIT_FAILED before nvmet_req_uninit in digest error path (CVE-2026-64534)\n\n* kernel: net/mlx5: Fix MCIA register buffer overflow on 32 dword reads (CVE-2026-68293)\n\n* kernel: Linux kernel: libceph stack out-of-bounds write via crafted OSDMap (CVE-2026-68159)\n\n* kernel: Linux kernel Bluetooth RFCOMM: Denial of Service via use-after-free in set_termios (CVE-2026-68188)\n\n* kernel: Linux kernel (libceph): Denial of Service due to malformed monitor maps (CVE-2026-68155)\n\n* kernel: Bluetooth: mgmt: hold reference for hci_conn in mgmt_pending_cmds (CVE-2026-68391)\n\n* kernel: mm/hugetlb: fix list corruption in allocate_file_region_entries() (CVE-2026-74518)\n\nBug Fix(es) and Enhancement(s):\n\n* Update kernel to use new certificate paths [rhel-10.2.z] (JIRA:Rocky Linux-169478)\n\n* RHIVOS - [backport] S32G Driver Enablement - PWM (JIRA:Rocky Linux-255517)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
  "id": "RLSA-2026:70498",
  "modified": "2026-09-30T06:15:31.348023Z",
  "published": "2026-09-24T12:09:42.603821Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLSA-2026:70498"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2403545"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2481940"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2481948"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492278"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502218"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507399"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513150"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513165"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513222"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513295"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513453"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517004"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:70498"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Important: kernel security, bug fix, and enhancement update",
  "upstream": [
    "CVE-2025-39964",
    "CVE-2026-45894",
    "CVE-2026-45959",
    "CVE-2026-53062",
    "CVE-2026-63823",
    "CVE-2026-64534",
    "CVE-2026-68155",
    "CVE-2026-68159",
    "CVE-2026-68188",
    "CVE-2026-68293",
    "CVE-2026-68391",
    "CVE-2026-74518"
  ]
}

SUSE-SU-2026:23477-1

Vulnerability from csaf_suse - Published: 2026-09-08 12:54 - Updated: 2026-09-29 08:19

Summary

Security update for the Linux Kernel

Severity

Important

Scope

588 vulnerabilities in this advisory, including CVE-2026-74518.

CVE-2026-74518

7 (High)


                
                  CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Recommended: 4 products

Open the full advisory

SUSE-SU-2026:23481-1

Vulnerability from csaf_suse - Published: 2026-09-08 13:00 - Updated: 2026-09-29 08:19

Summary

Security update for the Linux Kernel

Severity

Important

Scope

588 vulnerabilities in this advisory, including CVE-2026-74518.

CVE-2026-74518

7 (High)


                
                  CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Recommended: 11 products

Open the full advisory

SUSE-SU-2026:23528-1

Vulnerability from csaf_suse - Published: 2026-09-08 10:34 - Updated: 2026-09-29 08:19

Summary

Security update for the Linux Kernel

Severity

Important

Scope

588 vulnerabilities in this advisory, including CVE-2026-74518.

CVE-2026-74518

7 (High)


                
                  CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Recommended: 7 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-74518 (GCVE-0-2026-74518)

RLSA-2026:70459 (CVE-2025-39964)

RLSA-2026:70498 (CVE-2025-39964)

Tags

Sightings

Nomenclature

Related by attack behaviour