{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "02a52c5c8c3b8cbad0f12009cde9f36dbefb6972"
            },
            {
              "fixed": "2d29983104f06f5b0babcd5a25a0f0408272cd27"
            },
            {
              "fixed": "a4f182f8715cb0819445f0850cd5436828f4bafc"
            },
            {
              "fixed": "1059789ae9f99cbbe3a78e361e9c0976beb5958b"
            },
            {
              "fixed": "1acc317d67a755a45e32419a15d70e403fa43f0e"
            },
            {
              "fixed": "a42932c6aa33d0aac683cacdf1ec7009b955ba5d"
            },
            {
              "fixed": "1b4ff94ae7c580c880291519fb0e3e2bd075beef"
            },
            {
              "fixed": "219c96de5d9b6b4af7e8576ad897b774cc3ee9a7"
            },
            {
              "fixed": "e5c0235a3c4e9eb047a16cd02323fe4ecf2f570e"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.10.0"
            },
            {
              "fixed": "5.10.266"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.217"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.184"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.153"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.105"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.46"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80756.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nselinux: do not cancel a policy conversion that never started\n\nsel_write_load() calls selinux_policy_cancel() when sel_make_policy_nodes()\nfails, and that helper dereferences the outgoing policy to cancel its\nsidtab conversion. On the first policy load there is no outgoing policy:\nsecurity_load_policy() returns early for that case, before it converts\nanything, and state-\u003epolicy is still NULL. A first load that fails while\nbuilding the selinuxfs tree therefore takes a NULL dereference in\nselinux_policy_cancel(), reached from a write(2) to /sys/fs/selinux/load.\n\nSkip the cancel when there is no old policy, mirroring the check\nsecurity_load_policy() already makes before it converts.",
  "id": "CVE-2026-80756",
  "modified": "2026-09-05T03:30:55.665755685Z",
  "published": "2026-09-03T08:26:34.396Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1059789ae9f99cbbe3a78e361e9c0976beb5958b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1acc317d67a755a45e32419a15d70e403fa43f0e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1b4ff94ae7c580c880291519fb0e3e2bd075beef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/219c96de5d9b6b4af7e8576ad897b774cc3ee9a7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2d29983104f06f5b0babcd5a25a0f0408272cd27"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a42932c6aa33d0aac683cacdf1ec7009b955ba5d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a4f182f8715cb0819445f0850cd5436828f4bafc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e5c0235a3c4e9eb047a16cd02323fe4ecf2f570e"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80756.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80756"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "selinux: do not cancel a policy conversion that never started"
}