{"id":"CVE-2026-80756","summary":"selinux: do not cancel a policy conversion that never started","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.","modified":"2026-09-05T03:48:19.483688915Z","published":"2026-09-03T08:26:34.396Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80756.json"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"02a52c5c8c3b8cbad0f12009cde9f36dbefb6972"},{"fixed":"2d29983104f06f5b0babcd5a25a0f0408272cd27"},{"fixed":"a4f182f8715cb0819445f0850cd5436828f4bafc"},{"fixed":"1059789ae9f99cbbe3a78e361e9c0976beb5958b"},{"fixed":"1acc317d67a755a45e32419a15d70e403fa43f0e"},{"fixed":"a42932c6aa33d0aac683cacdf1ec7009b955ba5d"},{"fixed":"1b4ff94ae7c580c880291519fb0e3e2bd075beef"},{"fixed":"219c96de5d9b6b4af7e8576ad897b774cc3ee9a7"},{"fixed":"e5c0235a3c4e9eb047a16cd02323fe4ecf2f570e"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80756.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","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"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80756.json"}}],"schema_version":"1.9.0"}