CVE-2026-68158 (GCVE-0-2026-68158)

Vulnerability from cvelistv5 – Published: 2026-08-10 11:59 – Updated: 2026-08-19 16:30
VLAI
Title
libceph: Fix multiplication overflow in decode_new_up_state_weight()
Summary
In the Linux kernel, the following vulnerability has been resolved: libceph: Fix multiplication overflow in decode_new_up_state_weight() If a message of type CEPH_MSG_OSD_MAP contains a (maliciously) corrupted osdmap, out-of-bounds memory accesses may occur in decode_new_up_state_weight(). This happens because the bounds check for the new_state part is based on calculating its length depending on a len value read from the incoming message. This calculation may overflow leading to an incorrect bounds check. Subsequently, out-of-bounds reads may occur when decoding this part. This patch switches the multiplication to use check_mul_overflow() to abort processing the osdmap if an overflow occurred. Therefore, osdmaps/messages containing large values for len that result in a multiplication overflow are treated as invalid. [ idryomov: rename new_state_len -> new_state_item_size, formatting ]
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 930c532869774ebf8af9efe9484c597f896a7d46 , < 2ceee3b77b83052648c40fef965f836fd7699d26 (git)
Affected: 930c532869774ebf8af9efe9484c597f896a7d46 , < e4473751cc37db41f3f7da25d64a23e0c74570f1 (git)
Affected: 930c532869774ebf8af9efe9484c597f896a7d46 , < f6961070c326bd158c38fa48756cde2bd78c4aaa (git)
Affected: 930c532869774ebf8af9efe9484c597f896a7d46 , < 05c90e059269f087becfcce23348496085835c29 (git)
Affected: 930c532869774ebf8af9efe9484c597f896a7d46 , < 143ba49ead77ec483c0326f8aaad8649874e99c4 (git)
Affected: 930c532869774ebf8af9efe9484c597f896a7d46 , < 1732d89dfcd74f6fde9ce70900d316c4a151c153 (git)
Affected: 930c532869774ebf8af9efe9484c597f896a7d46 , < bee4b5b53e7bff0467fd916cc44c9b190733c6bd (git)
Affected: 930c532869774ebf8af9efe9484c597f896a7d46 , < 98917a499ec7064c14fc56d180a4fd636fc2784c (git)
Affected: 1196c36fd53c3b1615eb02f986cb727b1dfc1047 (git)
Affected: bbc3aa6b0e6050b2b2e04a08dd4d6423d576b196 (git)
Affected: 6b96b2d473701b45df3fea8dd9796b6ec39e6d54 (git)
Affected: 7405d73cea0d0e6c541f5c534078feeb46188844 (git)
Affected: 8777c9f654637d56f4c4ca54eb1bc7c609b70085 (git)
Affected: 6831c98ce0b8a3e88db64aa224372effd0dcc694 (git)
Affected: 032951d32c13b7564dfba82758260cb7aa1149d2 (git)
Affected: 14877928f10667a5606383885d004f7185f33718 (git)
Affected: 3.10.103 , < 3.11 (semver)
Affected: 3.12.63 , < 3.13 (semver)
Affected: 3.14.75 , < 3.15 (semver)
Affected: 3.16.39 , < 3.17 (semver)
Affected: 3.18.39 , < 3.19 (semver)
Affected: 4.1.30 , < 4.2 (semver)
Affected: 4.4.17 , < 4.5 (semver)
Affected: 4.6.6 , < 4.7 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 4.7
Unaffected: 0 , < 4.7 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.148 , ≤ 6.6.* (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ceph/osdmap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2ceee3b77b83052648c40fef965f836fd7699d26",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "e4473751cc37db41f3f7da25d64a23e0c74570f1",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "f6961070c326bd158c38fa48756cde2bd78c4aaa",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "05c90e059269f087becfcce23348496085835c29",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "143ba49ead77ec483c0326f8aaad8649874e99c4",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "1732d89dfcd74f6fde9ce70900d316c4a151c153",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "bee4b5b53e7bff0467fd916cc44c9b190733c6bd",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "98917a499ec7064c14fc56d180a4fd636fc2784c",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1196c36fd53c3b1615eb02f986cb727b1dfc1047",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "bbc3aa6b0e6050b2b2e04a08dd4d6423d576b196",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6b96b2d473701b45df3fea8dd9796b6ec39e6d54",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "7405d73cea0d0e6c541f5c534078feeb46188844",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8777c9f654637d56f4c4ca54eb1bc7c609b70085",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6831c98ce0b8a3e88db64aa224372effd0dcc694",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "032951d32c13b7564dfba82758260cb7aa1149d2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "14877928f10667a5606383885d004f7185f33718",
              "versionType": "git"
            },
            {
              "lessThan": "3.11",
              "status": "affected",
              "version": "3.10.103",
              "versionType": "semver"
            },
            {
              "lessThan": "3.13",
              "status": "affected",
              "version": "3.12.63",
              "versionType": "semver"
            },
            {
              "lessThan": "3.15",
              "status": "affected",
              "version": "3.14.75",
              "versionType": "semver"
            },
            {
              "lessThan": "3.17",
              "status": "affected",
              "version": "3.16.39",
              "versionType": "semver"
            },
            {
              "lessThan": "3.19",
              "status": "affected",
              "version": "3.18.39",
              "versionType": "semver"
            },
            {
              "lessThan": "4.2",
              "status": "affected",
              "version": "4.1.30",
              "versionType": "semver"
            },
            {
              "lessThan": "4.5",
              "status": "affected",
              "version": "4.4.17",
              "versionType": "semver"
            },
            {
              "lessThan": "4.7",
              "status": "affected",
              "version": "4.6.6",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ceph/osdmap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.7"
            },
            {
              "lessThan": "4.7",
              "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": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "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": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.216",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.183",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.148",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.101",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.42",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.6",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "3.10.103",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "3.12.63",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "3.14.75",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "3.16.39",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "3.18.39",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.1.30",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.6.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: Fix multiplication overflow in decode_new_up_state_weight()\n\nIf a message of type CEPH_MSG_OSD_MAP contains a (maliciously) corrupted\nosdmap, out-of-bounds memory accesses may occur in\ndecode_new_up_state_weight(). This happens because the bounds check for\nthe new_state part is based on calculating its length depending on a len\nvalue read from the incoming message. This calculation may overflow\nleading to an incorrect bounds check. Subsequently, out-of-bounds reads\nmay occur when decoding this part.\n\nThis patch switches the multiplication to use check_mul_overflow() to\nabort processing the osdmap if an overflow occurred. Therefore,\nosdmaps/messages containing large values for len that result in a\nmultiplication overflow are treated as invalid.\n\n[ idryomov: rename new_state_len -\u003e new_state_item_size, formatting ]"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - Malformed incremental osdmap data is delivered in CEPH_MSG_OSD_MAP over TCP from a Ceph monitor (mon_dispatch) or OSD (osd_dispatch) to libceph clients (CephFS/RBD), and the overflow is triggered while decoding received network bytes in osdmap_apply_incremental().\nAC:L - A compromised or attacker-controlled monitor/OSD can publish an incremental osdmap with epoch N+1 and a crafted new_state length that wraps the multiply, reliably bypassing bounds checks without races or victim-specific memory layout.\nPR:N - Exploitation requires no privileges on the victim host; a malicious cluster peer or on-path attacker that can deliver forged osdmaps to an already-connected kernel Ceph client needs no local account, capabilities, or user-namespace tricks.\nUI:N - Once a host is a Ceph client, osdmap subscriptions and updates are applied automatically by the kernel; no additional mount, open, or interactive step is needed at exploit time beyond the existing client session.\nS:U - Impact is confined to kernel memory and libceph client state on the Ceph client host (info leak, map corruption, crash, or privilege escalation); it does not cross VM, IOMMU, or sandbox boundaries to another security authority.\nC:H - Integer-overflow bypass lets decode_new_up_state_weight() run bare ceph_decode_32/8 loops past the message end, performing out-of-bounds reads of adjacent kernel heap/slack memory that can disclose pointers and other sensitive data.\nI:H - Misaligned decoding also drives attacker-controlled osd/xorstate/weight values into map-\u003eosd_weight[], map-\u003eosd_state[], and map-\u003eosd_addr[] updates (including memset), corrupting kernel osdmap state in ways usable for further exploitation.\nA:H - Unbounded out-of-bounds reads while parsing osdmaps can fault on unmapped pages and trigger kernel oops/panic; map corruption can also cause persistent client failure, repeatable on each malicious incremental map."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:30:30.014Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2ceee3b77b83052648c40fef965f836fd7699d26"
        },
        {
          "url": "https://git.kernel.org/stable/c/e4473751cc37db41f3f7da25d64a23e0c74570f1"
        },
        {
          "url": "https://git.kernel.org/stable/c/f6961070c326bd158c38fa48756cde2bd78c4aaa"
        },
        {
          "url": "https://git.kernel.org/stable/c/05c90e059269f087becfcce23348496085835c29"
        },
        {
          "url": "https://git.kernel.org/stable/c/143ba49ead77ec483c0326f8aaad8649874e99c4"
        },
        {
          "url": "https://git.kernel.org/stable/c/1732d89dfcd74f6fde9ce70900d316c4a151c153"
        },
        {
          "url": "https://git.kernel.org/stable/c/bee4b5b53e7bff0467fd916cc44c9b190733c6bd"
        },
        {
          "url": "https://git.kernel.org/stable/c/98917a499ec7064c14fc56d180a4fd636fc2784c"
        }
      ],
      "title": "libceph: Fix multiplication overflow in decode_new_up_state_weight()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68158",
    "datePublished": "2026-08-10T11:59:24.675Z",
    "dateReserved": "2026-07-30T09:28:09.371Z",
    "dateUpdated": "2026-08-19T16:30:30.014Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-68158",
      "date": "2026-09-20",
      "epss": "0.00704",
      "percentile": "0.51845"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "net/ceph/osdmap.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "2ceee3b77b83052648c40fef965f836fd7699d26",
                    "status": "affected",
                    "version": "930c532869774ebf8af9efe9484c597f896a7d46",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "e4473751cc37db41f3f7da25d64a23e0c74570f1",
                    "status": "affected",
                    "version": "930c532869774ebf8af9efe9484c597f896a7d46",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "f6961070c326bd158c38fa48756cde2bd78c4aaa",
                    "status": "affected",
                    "version": "930c532869774ebf8af9efe9484c597f896a7d46",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "05c90e059269f087becfcce23348496085835c29",
                    "status": "affected",
                    "version": "930c532869774ebf8af9efe9484c597f896a7d46",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "143ba49ead77ec483c0326f8aaad8649874e99c4",
                    "status": "affected",
                    "version": "930c532869774ebf8af9efe9484c597f896a7d46",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "1732d89dfcd74f6fde9ce70900d316c4a151c153",
                    "status": "affected",
                    "version": "930c532869774ebf8af9efe9484c597f896a7d46",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "bee4b5b53e7bff0467fd916cc44c9b190733c6bd",
                    "status": "affected",
                    "version": "930c532869774ebf8af9efe9484c597f896a7d46",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "98917a499ec7064c14fc56d180a4fd636fc2784c",
                    "status": "affected",
                    "version": "930c532869774ebf8af9efe9484c597f896a7d46",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "1196c36fd53c3b1615eb02f986cb727b1dfc1047",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "bbc3aa6b0e6050b2b2e04a08dd4d6423d576b196",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "6b96b2d473701b45df3fea8dd9796b6ec39e6d54",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "7405d73cea0d0e6c541f5c534078feeb46188844",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "8777c9f654637d56f4c4ca54eb1bc7c609b70085",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "6831c98ce0b8a3e88db64aa224372effd0dcc694",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "032951d32c13b7564dfba82758260cb7aa1149d2",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "14877928f10667a5606383885d004f7185f33718",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "3.11",
                    "status": "affected",
                    "version": "3.10.103",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "3.13",
                    "status": "affected",
                    "version": "3.12.63",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "3.15",
                    "status": "affected",
                    "version": "3.14.75",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "3.17",
                    "status": "affected",
                    "version": "3.16.39",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "3.19",
                    "status": "affected",
                    "version": "3.18.39",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "4.2",
                    "status": "affected",
                    "version": "4.1.30",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "4.5",
                    "status": "affected",
                    "version": "4.4.17",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "4.7",
                    "status": "affected",
                    "version": "4.6.6",
                    "versionType": "semver"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "net/ceph/osdmap.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "4.7"
                  },
                  {
                    "lessThan": "4.7",
                    "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": "6.6.148",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.101",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.42",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "7.1.*",
                    "status": "unaffected",
                    "version": "7.1.6",
                    "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\nlibceph: Fix multiplication overflow in decode_new_up_state_weight()\n\nIf a message of type CEPH_MSG_OSD_MAP contains a (maliciously) corrupted\nosdmap, out-of-bounds memory accesses may occur in\ndecode_new_up_state_weight(). This happens because the bounds check for\nthe new_state part is based on calculating its length depending on a len\nvalue read from the incoming message. This calculation may overflow\nleading to an incorrect bounds check. Subsequently, out-of-bounds reads\nmay occur when decoding this part.\n\nThis patch switches the multiplication to use check_mul_overflow() to\nabort processing the osdmap if an overflow occurred. Therefore,\nosdmaps/messages containing large values for len that result in a\nmultiplication overflow are treated as invalid.\n\n[ idryomov: rename new_state_len -\u003e new_state_item_size, formatting ]"
          }
        ],
        "id": "CVE-2026-68158",
        "lastModified": "2026-08-19T17:20:33.133",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 9.8,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-08-10T13:20:02.033",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/05c90e059269f087becfcce23348496085835c29"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/143ba49ead77ec483c0326f8aaad8649874e99c4"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/1732d89dfcd74f6fde9ce70900d316c4a151c153"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/2ceee3b77b83052648c40fef965f836fd7699d26"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/98917a499ec7064c14fc56d180a4fd636fc2784c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/bee4b5b53e7bff0467fd916cc44c9b190733c6bd"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/e4473751cc37db41f3f7da25d64a23e0c74570f1"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/f6961070c326bd158c38fa48756cde2bd78c4aaa"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-13T23:18:00+00:00",
      "cve": "CVE-2026-68158",
      "id": "CVE-2026-68158",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "260",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: libceph: Fix multiplication overflow in decode_new_up_state_weight()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68158.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-18T00:35:00Z",
      "cve": "CVE-2026-68158",
      "id": "CVE-2026-68158",
      "initial_release_date": "2026-08-18T00:08:26Z",
      "product_status:first_fixed": "127",
      "product_status:known_affected": "715",
      "product_status:known_not_affected": "4",
      "product_status:recommended": "107",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68158",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68158.json",
      "version": "9"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


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.