{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7"
            },
            {
              "fixed": "6c2ab7c4549f4f2305848df834e784651dbf1676"
            },
            {
              "fixed": "dfc59a062c386d3d4415ecdab781065a645f33cc"
            },
            {
              "fixed": "a7f3d4f22d920dc3c7d75f02ece0f7bf2c58437e"
            },
            {
              "fixed": "d14b5d0e97fccd27974fedc03b903408872907fd"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.23"
            },
            {
              "fixed": "6.12.108"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.49"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80755.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nselinux: reject a permission value exceeding the class permission count\n\nperm_read() bounds a permission value by SEL_VEC_MAX but never by the\nnprim of the owning class or common, which is taken verbatim from the\npolicy image.  security_get_permissions() then writes perms[value - 1]\ninto an nprim-sized kcalloc() array, so a class declaring fewer\npermissions than its largest permission value drives an out-of-bounds\nheap write.  The top-level symbol tables are validated this way; the\nnested per-class permission table is not.\n\nReject a permission whose value exceeds nprim, which is already set when\nperm_read() runs.  Well-formed policies are unaffected.\n\n[PM: tweak comment for line length]",
  "id": "CVE-2026-80755",
  "modified": "2026-09-05T03:30:50.141096822Z",
  "published": "2026-09-03T08:26:33.797Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6c2ab7c4549f4f2305848df834e784651dbf1676"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a7f3d4f22d920dc3c7d75f02ece0f7bf2c58437e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d14b5d0e97fccd27974fedc03b903408872907fd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dfc59a062c386d3d4415ecdab781065a645f33cc"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80755.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80755"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "selinux: reject a permission value exceeding the class permission count"
}