CVE-2026-80757

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: selinux: reject a class permission count below its inherited common security_get_permissions() maps an inherited common's permissions into an array sized by the class's own permissions.nprim, but class_read() takes that nprim verbatim from the policy image and never checks that it covers the common. A class that inherits a common of N permissions while declaring a smaller nprim is accepted, and on load the common's permissions are written past the class-sized array -- an out-of-bounds heap write. Reject a class whose permission count is below its inherited common's. Well-formed policies, where the class count already includes the inherited permissions, are unaffected.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-03 13:06:15.493000

Last modified

2026-11-06 17:19:58.013000

View original CVE JSON

{
  "id": "CVE-2026-80757",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-03T13:06:15.493",
  "lastModified": "2026-11-06T17:19:58.013",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nselinux: reject a class permission count below its inherited common\n\nsecurity_get_permissions() maps an inherited common's permissions into\nan array sized by the class's own permissions.nprim, but class_read()\ntakes that nprim verbatim from the policy image and never checks that it\ncovers the common.  A class that inherits a common of N permissions while\ndeclaring a smaller nprim is accepted, and on load the common's\npermissions are written past the class-sized array -- an out-of-bounds\nheap write.\n\nReject a class whose permission count is below its inherited common's.\nWell-formed policies, where the class count already includes the\ninherited permissions, are unaffected."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "security/selinux/ss/policydb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7",
              "lessThan": "2002ff745db64ac83ee1bb9ff78196d2d68bfdb3",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7",
              "lessThan": "38d91446630a20ce8c2a981810deea81fd61a3b5",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7",
              "lessThan": "638213f2e6ea52c06a25861616781338d154db35",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7",
              "lessThan": "2b7ffd7921fcbfe408fb7b372e47454e45b1e6a7",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7",
              "lessThan": "a63011c009ea79439b800a05602b880eb4adbb05",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7",
              "lessThan": "acd5b09be98fd38b7392307880156fb0452a7276",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7",
              "lessThan": "1b995966c3ae5244751bdaee9bfe7e17567d4fbe",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7",
              "lessThan": "9a82dcd98b6e6e11cfd162410967951f12152528",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "security/selinux/ss/policydb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "2.6.23",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "2.6.23",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.10.266",
              "lessThanOrEqual": "5.10.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.15.217",
              "lessThanOrEqual": "5.15.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.184",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.153",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.105",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.46",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.1.10",
              "lessThanOrEqual": "7.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-11-06T17:03:13.490932Z",
          "id": "CVE-2026-80757",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1b995966c3ae5244751bdaee9bfe7e17567d4fbe",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2002ff745db64ac83ee1bb9ff78196d2d68bfdb3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2b7ffd7921fcbfe408fb7b372e47454e45b1e6a7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/38d91446630a20ce8c2a981810deea81fd61a3b5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/638213f2e6ea52c06a25861616781338d154db35",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9a82dcd98b6e6e11cfd162410967951f12152528",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a63011c009ea79439b800a05602b880eb4adbb05",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/acd5b09be98fd38b7392307880156fb0452a7276",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
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}