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FKIE_CVE-2026-80912

Vulnerability from fkie_nvd - Published: 2026-09-04 18:18 - Updated: 2026-09-04 18:18
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: selinux: reject an unclaimed class value in security_get_classes() security_get_classes() sizes an array by p_classes.nprim and fills it at value - 1, so a class value the policy never defines leaves a NULL. sel_make_classes() passes every entry to sel_make_dir(), reaching the same d_alloc_name() dereference as the permission array. The class symbol table is allowed to be sparse (policydb_class_isvalid() exists to absorb that), but this getter builds its own array straight from the hash table and has no such predicate. Fail the lookup when a value went unclaimed instead of handing out the NULL. Conforming policies define every class they declare and are unaffected.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/099869e9343a5f8c22b58497f074b34f63cbf856
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/22b05fec62c0fe9864cfceb52f7d0f3a34d9b1dd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/841aea4d5a25e16273d04cd07a74142b4687e03b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d8a10899ea3c84b80de72ca8ee9039e9a5156c9a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e0285bb152211c00900136b66d4b420c14a59094
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "security/selinux/ss/services.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e0285bb152211c00900136b66d4b420c14a59094",
              "status": "affected",
              "version": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7",
              "versionType": "git"
            },
            {
              "lessThan": "099869e9343a5f8c22b58497f074b34f63cbf856",
              "status": "affected",
              "version": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7",
              "versionType": "git"
            },
            {
              "lessThan": "841aea4d5a25e16273d04cd07a74142b4687e03b",
              "status": "affected",
              "version": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7",
              "versionType": "git"
            },
            {
              "lessThan": "d8a10899ea3c84b80de72ca8ee9039e9a5156c9a",
              "status": "affected",
              "version": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7",
              "versionType": "git"
            },
            {
              "lessThan": "22b05fec62c0fe9864cfceb52f7d0f3a34d9b1dd",
              "status": "affected",
              "version": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "security/selinux/ss/services.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.23"
            },
            {
              "lessThan": "2.6.23",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.153",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.105",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.10",
              "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\nselinux: reject an unclaimed class value in security_get_classes()\n\nsecurity_get_classes() sizes an array by p_classes.nprim and fills it at\nvalue - 1, so a class value the policy never defines leaves a NULL.\nsel_make_classes() passes every entry to sel_make_dir(), reaching the same\nd_alloc_name() dereference as the permission array. The class symbol table\nis allowed to be sparse (policydb_class_isvalid() exists to absorb that),\nbut this getter builds its own array straight from the hash table and has\nno such predicate.\n\nFail the lookup when a value went unclaimed instead of handing out the\nNULL. Conforming policies define every class they declare and are\nunaffected."
    }
  ],
  "id": "CVE-2026-80912",
  "lastModified": "2026-09-04T18:18:01.047",
  "metrics": {},
  "published": "2026-09-04T18:18:01.047",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/099869e9343a5f8c22b58497f074b34f63cbf856"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/22b05fec62c0fe9864cfceb52f7d0f3a34d9b1dd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/841aea4d5a25e16273d04cd07a74142b4687e03b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d8a10899ea3c84b80de72ca8ee9039e9a5156c9a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e0285bb152211c00900136b66d4b420c14a59094"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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