Vulnerability-Lookup

rlsa-2026:51035

Vulnerability from osv_rocky

Published

2026-08-07 18:04

Modified

2026-08-09 12:10

Summary

Moderate: 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: futex: Fix UaF between futex_key_to_node_opt() and vma_replace_policy() (CVE-2026-23415)
kernel: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() (CVE-2026-43450)

Bug Fix(es) and Enhancement(s):

kernel panics caused by NULL pointer dereferences within octeon_ep_vf [rhel-9.8.z] (JIRA:Rocky Linux-186331)
[Rocky Linux 9.4] Kernel memory reclaim bug [rhel-9.8.z] (JIRA:Rocky Linux-211058)
Bond network interface is not coming up with MTU 9000 while vPMEM is enabled [rhel-9.8.z] (JIRA:Rocky Linux-215575)

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

7.1 (High)


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

Credits

Rocky Enterprise Software Foundation

Red Hat

References

URL

Type

	https://errata.rockylinux.org/RLSA-2026:51035	ADVISORY
	https://bugzilla.redhat.com/show_bug.cgi?id=2454320	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2468228	REPORT

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": "0:5.14.0-687.36.1.el9_8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [
    {
      "name": "Rocky Enterprise Software Foundation"
    },
    {
      "name": "Red Hat"
    }
  ],
  "details": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: futex: Fix UaF between futex_key_to_node_opt() and vma_replace_policy() (CVE-2026-23415)\n\n* kernel: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() (CVE-2026-43450)\n\nBug Fix(es) and Enhancement(s):\n\n* kernel panics caused by NULL pointer dereferences within octeon_ep_vf [rhel-9.8.z] (JIRA:Rocky Linux-186331)\n\n* [Rocky Linux 9.4] Kernel memory reclaim bug  [rhel-9.8.z] (JIRA:Rocky Linux-211058)\n\n* Bond network interface is not coming up with MTU 9000 while vPMEM is enabled [rhel-9.8.z] (JIRA:Rocky Linux-215575)\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-2026:51035",
  "modified": "2026-08-09T12:10:20.572525Z",
  "published": "2026-08-07T18:04:13.032791Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLSA-2026:51035"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2454320"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468228"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Moderate: kernel security, bug fix, and enhancement update",
  "upstream": [
    "CVE-2026-23415",
    "CVE-2026-43450"
  ]
}

CVE-2026-23415 (GCVE-0-2026-23415)

Vulnerability from cvelistv5 – Published: 2026-04-02 11:40 – Updated: 2026-08-05 12:21

Title

futex: Fix UaF between futex_key_to_node_opt() and vma_replace_policy()

Summary

In the Linux kernel, the following vulnerability has been resolved: futex: Fix UaF between futex_key_to_node_opt() and vma_replace_policy() During futex_key_to_node_opt() execution, vma->vm_policy is read under speculative mmap lock and RCU. Concurrently, mbind() may call vma_replace_policy() which frees the old mempolicy immediately via kmem_cache_free(). This creates a race where __futex_key_to_node() dereferences a freed mempolicy pointer, causing a use-after-free read of mpol->mode. [ 151.412631] BUG: KASAN: slab-use-after-free in __futex_key_to_node (kernel/futex/core.c:349) [ 151.414046] Read of size 2 at addr ffff888001c49634 by task e/87 [ 151.415969] Call Trace: [ 151.416732] __asan_load2 (mm/kasan/generic.c:271) [ 151.416777] __futex_key_to_node (kernel/futex/core.c:349) [ 151.416822] get_futex_key (kernel/futex/core.c:374 kernel/futex/core.c:386 kernel/futex/core.c:593) Fix by adding rcu to __mpol_put().

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

References

3 references

URL	Tags
https://git.kernel.org/stable/c/853f70c67d1b37e36…
https://git.kernel.org/stable/c/7e196194ea27bd49a…
https://git.kernel.org/stable/c/190a8c48ff623c3d6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: c042c505210dc3453f378df432c10fff3d471bc5 , < 853f70c67d1b37e368fdcb3e328c4b8c04f53ac0 (git) Affected: c042c505210dc3453f378df432c10fff3d471bc5 , < 7e196194ea27bd49adf3551e2aceb83498eb73fe (git) Affected: c042c505210dc3453f378df432c10fff3d471bc5 , < 190a8c48ff623c3d67cb295b4536a660db2012aa (git)
Linux	Linux	Affected: 6.16 Unaffected: 0 , < 6.16 (semver) Unaffected: 6.18.21 , ≤ 6.18.* (semver) Unaffected: 6.19.11 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/linux/mempolicy.h",
            "kernel/futex/core.c",
            "mm/mempolicy.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "853f70c67d1b37e368fdcb3e328c4b8c04f53ac0",
              "status": "affected",
              "version": "c042c505210dc3453f378df432c10fff3d471bc5",
              "versionType": "git"
            },
            {
              "lessThan": "7e196194ea27bd49adf3551e2aceb83498eb73fe",
              "status": "affected",
              "version": "c042c505210dc3453f378df432c10fff3d471bc5",
              "versionType": "git"
            },
            {
              "lessThan": "190a8c48ff623c3d67cb295b4536a660db2012aa",
              "status": "affected",
              "version": "c042c505210dc3453f378df432c10fff3d471bc5",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/linux/mempolicy.h",
            "kernel/futex/core.c",
            "mm/mempolicy.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.21",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.21",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.11",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfutex: Fix UaF between futex_key_to_node_opt() and vma_replace_policy()\n\nDuring futex_key_to_node_opt() execution, vma-\u003evm_policy is read under\nspeculative mmap lock and RCU. Concurrently, mbind() may call\nvma_replace_policy() which frees the old mempolicy immediately via\nkmem_cache_free().\n\nThis creates a race where __futex_key_to_node() dereferences a freed\nmempolicy pointer, causing a use-after-free read of mpol-\u003emode.\n\n[  151.412631] BUG: KASAN: slab-use-after-free in __futex_key_to_node (kernel/futex/core.c:349)\n[  151.414046] Read of size 2 at addr ffff888001c49634 by task e/87\n\n[  151.415969] Call Trace:\n\n[  151.416732]  __asan_load2 (mm/kasan/generic.c:271)\n[  151.416777]  __futex_key_to_node (kernel/futex/core.c:349)\n[  151.416822]  get_futex_key (kernel/futex/core.c:374 kernel/futex/core.c:386 kernel/futex/core.c:593)\n\nFix by adding rcu to __mpol_put()."
        }
      ],
      "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 vulnerable path is reached through local futex2/io_uring futex operations using FUTEX2_MPOL against the caller\u0027s user address space. It is not exposed directly to remote packets or adjacent/physical inputs.\nAC:L - The attacker can control both sides of the race by running concurrent threads that invoke futex wake/wait key derivation and mbind()/set_mempolicy_home_node() policy replacement on the same VMA. No external victim timing or rare state is required once the affected CONFIG_FUTEX_MPOL kernel is in use.\nPR:L - Both futex operations and basic mbind() VMA policy replacement are available to an unprivileged local user for their own process address space. The only relevant capability check is for MPOL_MF_MOVE_ALL, which is not needed to replace the VMA policy and trigger the UAF.\nUI:N - No victim action is required; the attacker can create the mapping, set policy, and issue the racing syscalls directly. Exploitation is self-contained in attacker-controlled local processes/threads.\nS:U - The bug is in the kernel\u0027s futex/mempolicy handling and affects the same kernel security authority. This is a standard local kernel vulnerability rather than a VM/IOMMU or separate-scope boundary crossing.\nC:H - This is a kernel use-after-free of struct mempolicy during futex key derivation, and UAF conditions can expose freed kernel heap contents or be shaped with heap reuse. Following the higher-severity rule for UAFs, confidentiality impact is High.\nI:H - The stale mempolicy data influences futex hash node selection and subsequent kernel data structure access, making memory corruption or control-flow-relevant exploitation defensible under UAF heap reuse. Following the higher-severity rule for UAFs, integrity impact is High.\nA:H - The reported failure is a KASAN slab-use-after-free in __futex_key_to_node(), and stale or invalid policy data can crash/oops the kernel. A local attacker can trigger the race repeatedly, so availability impact is High."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:21:35.941Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/853f70c67d1b37e368fdcb3e328c4b8c04f53ac0"
        },
        {
          "url": "https://git.kernel.org/stable/c/7e196194ea27bd49adf3551e2aceb83498eb73fe"
        },
        {
          "url": "https://git.kernel.org/stable/c/190a8c48ff623c3d67cb295b4536a660db2012aa"
        }
      ],
      "title": "futex: Fix UaF between futex_key_to_node_opt() and vma_replace_policy()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23415",
    "datePublished": "2026-04-02T11:40:56.476Z",
    "dateReserved": "2026-01-13T15:37:46.014Z",
    "dateUpdated": "2026-08-05T12:21:35.941Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-43450 (GCVE-0-2026-43450)

Vulnerability from cvelistv5 – Published: 2026-05-08 14:22 – Updated: 2026-05-11 22:24

Title

netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table()

Summary

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() nfnl_cthelper_dump_table() has a 'goto restart' that jumps to a label inside the for loop body. When the "last" helper saved in cb->args[1] is deleted between dump rounds, every entry fails the (cur != last) check, so cb->args[1] is never cleared. The for loop finishes with cb->args[0] == nf_ct_helper_hsize, and the 'goto restart' jumps back into the loop body bypassing the bounds check, causing an 8-byte out-of-bounds read on nf_ct_helper_hash[nf_ct_helper_hsize]. The 'goto restart' block was meant to re-traverse the current bucket when "last" is no longer found, but it was placed after the for loop instead of inside it. Move the block into the for loop body so that the restart only occurs while cb->args[0] is still within bounds. BUG: KASAN: slab-out-of-bounds in nfnl_cthelper_dump_table+0x9f/0x1b0 Read of size 8 at addr ffff888104ca3000 by task poc_cthelper/131 Call Trace: nfnl_cthelper_dump_table+0x9f/0x1b0 netlink_dump+0x333/0x880 netlink_recvmsg+0x3e2/0x4b0 sock_recvmsg+0xde/0xf0 __sys_recvfrom+0x150/0x200 __x64_sys_recvfrom+0x76/0x90 do_syscall_64+0xc3/0x6e0 Allocated by task 1: __kvmalloc_node_noprof+0x21b/0x700 nf_ct_alloc_hashtable+0x65/0xd0 nf_conntrack_helper_init+0x21/0x60 nf_conntrack_init_start+0x18d/0x300 nf_conntrack_standalone_init+0x12/0xc0

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/0605e1985a95d4334…
https://git.kernel.org/stable/c/92441f6d9405a0c18…
https://git.kernel.org/stable/c/3cc328ffc32ddb389…
https://git.kernel.org/stable/c/4a1f6ee69267a5f52…
https://git.kernel.org/stable/c/894c5780ddadd5fde…
https://git.kernel.org/stable/c/05018cd9370f77bb1…
https://git.kernel.org/stable/c/61b3a1f8621df1a59…
https://git.kernel.org/stable/c/6dcee8496d53165b2…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 12f7a505331e6b2754684b509f2ac8f0011ce644 , < 0605e1985a95d4334a67869aee45a47e82301abf (git) Affected: 12f7a505331e6b2754684b509f2ac8f0011ce644 , < 92441f6d9405a0c18d03f278b395e782f79a4a30 (git) Affected: 12f7a505331e6b2754684b509f2ac8f0011ce644 , < 3cc328ffc32ddb389cba7b78b6aa95d995c2876e (git) Affected: 12f7a505331e6b2754684b509f2ac8f0011ce644 , < 4a1f6ee69267a5f524102c028981410eeacfa3da (git) Affected: 12f7a505331e6b2754684b509f2ac8f0011ce644 , < 894c5780ddadd5fde0e16f66587918e6be1504c4 (git) Affected: 12f7a505331e6b2754684b509f2ac8f0011ce644 , < 05018cd9370f77bb18fbf6e15ff33c7a06f10b3c (git) Affected: 12f7a505331e6b2754684b509f2ac8f0011ce644 , < 61b3a1f8621df1a5928118313f133996f6a786db (git) Affected: 12f7a505331e6b2754684b509f2ac8f0011ce644 , < 6dcee8496d53165b2d8a5909b3050b62ae71fe89 (git)
Linux	Linux	Affected: 3.6 Unaffected: 0 , < 3.6 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.167 , ≤ 6.1.* (semver) Unaffected: 6.6.130 , ≤ 6.6.* (semver) Unaffected: 6.12.78 , ≤ 6.12.* (semver) Unaffected: 6.18.19 , ≤ 6.18.* (semver) Unaffected: 6.19.9 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nfnetlink_cthelper.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0605e1985a95d4334a67869aee45a47e82301abf",
              "status": "affected",
              "version": "12f7a505331e6b2754684b509f2ac8f0011ce644",
              "versionType": "git"
            },
            {
              "lessThan": "92441f6d9405a0c18d03f278b395e782f79a4a30",
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              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "4a1f6ee69267a5f524102c028981410eeacfa3da",
              "status": "affected",
              "version": "12f7a505331e6b2754684b509f2ac8f0011ce644",
              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "61b3a1f8621df1a5928118313f133996f6a786db",
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              "versionType": "git"
            },
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.6"
            },
            {
              "lessThan": "3.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.253",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.203",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.167",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.130",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.78",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.19",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.253",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.167",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.130",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.78",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.19",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.9",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table()\n\nnfnl_cthelper_dump_table() has a \u0027goto restart\u0027 that jumps to a label\ninside the for loop body.  When the \"last\" helper saved in cb-\u003eargs[1]\nis deleted between dump rounds, every entry fails the (cur != last)\ncheck, so cb-\u003eargs[1] is never cleared.  The for loop finishes with\ncb-\u003eargs[0] == nf_ct_helper_hsize, and the \u0027goto restart\u0027 jumps back\ninto the loop body bypassing the bounds check, causing an 8-byte\nout-of-bounds read on nf_ct_helper_hash[nf_ct_helper_hsize].\n\nThe \u0027goto restart\u0027 block was meant to re-traverse the current bucket\nwhen \"last\" is no longer found, but it was placed after the for loop\ninstead of inside it.  Move the block into the for loop body so that\nthe restart only occurs while cb-\u003eargs[0] is still within bounds.\n\n BUG: KASAN: slab-out-of-bounds in nfnl_cthelper_dump_table+0x9f/0x1b0\n Read of size 8 at addr ffff888104ca3000 by task poc_cthelper/131\n Call Trace:\n  nfnl_cthelper_dump_table+0x9f/0x1b0\n  netlink_dump+0x333/0x880\n  netlink_recvmsg+0x3e2/0x4b0\n  sock_recvmsg+0xde/0xf0\n  __sys_recvfrom+0x150/0x200\n  __x64_sys_recvfrom+0x76/0x90\n  do_syscall_64+0xc3/0x6e0\n\n Allocated by task 1:\n  __kvmalloc_node_noprof+0x21b/0x700\n  nf_ct_alloc_hashtable+0x65/0xd0\n  nf_conntrack_helper_init+0x21/0x60\n  nf_conntrack_init_start+0x18d/0x300\n  nf_conntrack_standalone_init+0x12/0xc0"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:24:49.527Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0605e1985a95d4334a67869aee45a47e82301abf"
        },
        {
          "url": "https://git.kernel.org/stable/c/92441f6d9405a0c18d03f278b395e782f79a4a30"
        },
        {
          "url": "https://git.kernel.org/stable/c/3cc328ffc32ddb389cba7b78b6aa95d995c2876e"
        },
        {
          "url": "https://git.kernel.org/stable/c/4a1f6ee69267a5f524102c028981410eeacfa3da"
        },
        {
          "url": "https://git.kernel.org/stable/c/894c5780ddadd5fde0e16f66587918e6be1504c4"
        },
        {
          "url": "https://git.kernel.org/stable/c/05018cd9370f77bb18fbf6e15ff33c7a06f10b3c"
        },
        {
          "url": "https://git.kernel.org/stable/c/61b3a1f8621df1a5928118313f133996f6a786db"
        },
        {
          "url": "https://git.kernel.org/stable/c/6dcee8496d53165b2d8a5909b3050b62ae71fe89"
        }
      ],
      "title": "netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43450",
    "datePublished": "2026-05-08T14:22:15.915Z",
    "dateReserved": "2026-05-01T14:12:56.010Z",
    "dateUpdated": "2026-05-11T22:24:49.527Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

rlsa-2026:51035

Vulnerability from osv_rocky

CVE-2026-23415 (GCVE-0-2026-23415)

CVE-2026-43450 (GCVE-0-2026-43450)

Tags

Sightings

Nomenclature