{"id":"CVE-2026-80756","title":"selinux: do not cancel a policy conversion that never started","summary":"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 derefe…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < 2d29983104f06f5b0babcd5a25a0f0408272cd27","Linux >= 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < a4f182f8715cb0819445f0850cd5436828f4bafc","Linux >= 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < 1059789ae9f99cbbe3a78e361e9c0976beb5958b","Linux >= 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < 1acc317d67a755a45e32419a15d70e403fa43f0e","Linux >= 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < a42932c6aa33d0aac683cacdf1ec7009b955ba5d","Linux >= 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < 1b4ff94ae7c580c880291519fb0e3e2bd075beef","Linux >= 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < 219c96de5d9b6b4af7e8576ad897b774cc3ee9a7","Linux >= 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < e5c0235a3c4e9eb047a16cd02323fe4ecf2f570e","Linux 5.10"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T17:03:09.106850Z"},"published":"2026-09-03","updated":"2026-11-06","sourceUpdated":"2026-11-06T17:05:53.807Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80756","references":[{"url":"https://git.kernel.org/stable/c/2d29983104f06f5b0babcd5a25a0f0408272cd27"},{"url":"https://git.kernel.org/stable/c/a4f182f8715cb0819445f0850cd5436828f4bafc"},{"url":"https://git.kernel.org/stable/c/1059789ae9f99cbbe3a78e361e9c0976beb5958b"},{"url":"https://git.kernel.org/stable/c/1acc317d67a755a45e32419a15d70e403fa43f0e"},{"url":"https://git.kernel.org/stable/c/a42932c6aa33d0aac683cacdf1ec7009b955ba5d"},{"url":"https://git.kernel.org/stable/c/1b4ff94ae7c580c880291519fb0e3e2bd075beef"},{"url":"https://git.kernel.org/stable/c/219c96de5d9b6b4af7e8576ad897b774cc3ee9a7"},{"url":"https://git.kernel.org/stable/c/e5c0235a3c4e9eb047a16cd02323fe4ecf2f570e"}],"tags":["cve.org"],"epss":0.00165,"epssPercentile":0.05702,"ingestedAt":"2026-11-06T18:00:12.534Z","slug":"CVE-2026-80756","body":"## Overview\n\nIn 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->policy 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.\n\n## Affected\n\n- `Linux >= 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < 2d29983104f06f5b0babcd5a25a0f0408272cd27`\n- `Linux >= 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < a4f182f8715cb0819445f0850cd5436828f4bafc`\n- `Linux >= 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < 1059789ae9f99cbbe3a78e361e9c0976beb5958b`\n- `Linux >= 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < 1acc317d67a755a45e32419a15d70e403fa43f0e`\n- `Linux >= 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < a42932c6aa33d0aac683cacdf1ec7009b955ba5d`\n- `Linux >= 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < 1b4ff94ae7c580c880291519fb0e3e2bd075beef`\n- `Linux >= 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < 219c96de5d9b6b4af7e8576ad897b774cc3ee9a7`\n- `Linux >= 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 < e5c0235a3c4e9eb047a16cd02323fe4ecf2f570e`\n- `Linux 5.10`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}