{"api_version":"1","generated_at":"2026-09-11T09:22:30+00:00","cve":"CVE-2026-80756","urls":{"html":"https://cve.report/CVE-2026-80756","api":"https://cve.report/api/cve/CVE-2026-80756.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80756","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80756"},"summary":{"title":"selinux: do not cancel a policy conversion that never started","description":"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->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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-03 13:06:15","updated_at":"2026-09-03 13:06:15"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/e5c0235a3c4e9eb047a16cd02323fe4ecf2f570e","name":"https://git.kernel.org/stable/c/e5c0235a3c4e9eb047a16cd02323fe4ecf2f570e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a42932c6aa33d0aac683cacdf1ec7009b955ba5d","name":"https://git.kernel.org/stable/c/a42932c6aa33d0aac683cacdf1ec7009b955ba5d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1059789ae9f99cbbe3a78e361e9c0976beb5958b","name":"https://git.kernel.org/stable/c/1059789ae9f99cbbe3a78e361e9c0976beb5958b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1b4ff94ae7c580c880291519fb0e3e2bd075beef","name":"https://git.kernel.org/stable/c/1b4ff94ae7c580c880291519fb0e3e2bd075beef","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a4f182f8715cb0819445f0850cd5436828f4bafc","name":"https://git.kernel.org/stable/c/a4f182f8715cb0819445f0850cd5436828f4bafc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1acc317d67a755a45e32419a15d70e403fa43f0e","name":"https://git.kernel.org/stable/c/1acc317d67a755a45e32419a15d70e403fa43f0e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/219c96de5d9b6b4af7e8576ad897b774cc3ee9a7","name":"https://git.kernel.org/stable/c/219c96de5d9b6b4af7e8576ad897b774cc3ee9a7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2d29983104f06f5b0babcd5a25a0f0408272cd27","name":"https://git.kernel.org/stable/c/2d29983104f06f5b0babcd5a25a0f0408272cd27","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80756","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80756","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 2d29983104f06f5b0babcd5a25a0f0408272cd27 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 a4f182f8715cb0819445f0850cd5436828f4bafc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 1059789ae9f99cbbe3a78e361e9c0976beb5958b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 1acc317d67a755a45e32419a15d70e403fa43f0e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.217 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.184 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.153 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.105 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.46 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.10 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"80756","cve":"CVE-2026-80756","epss":"0.002100000","percentile":"0.112230000","score_date":"2026-09-07","updated_at":"2026-09-08 00:05:28"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"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":"2d29983104f06f5b0babcd5a25a0f0408272cd27","status":"affected","version":"02a52c5c8c3b8cbad0f12009cde9f36dbefb6972","versionType":"git"},{"lessThan":"a4f182f8715cb0819445f0850cd5436828f4bafc","status":"affected","version":"02a52c5c8c3b8cbad0f12009cde9f36dbefb6972","versionType":"git"},{"lessThan":"1059789ae9f99cbbe3a78e361e9c0976beb5958b","status":"affected","version":"02a52c5c8c3b8cbad0f12009cde9f36dbefb6972","versionType":"git"},{"lessThan":"1acc317d67a755a45e32419a15d70e403fa43f0e","status":"affected","version":"02a52c5c8c3b8cbad0f12009cde9f36dbefb6972","versionType":"git"},{"lessThan":"a42932c6aa33d0aac683cacdf1ec7009b955ba5d","status":"affected","version":"02a52c5c8c3b8cbad0f12009cde9f36dbefb6972","versionType":"git"},{"lessThan":"1b4ff94ae7c580c880291519fb0e3e2bd075beef","status":"affected","version":"02a52c5c8c3b8cbad0f12009cde9f36dbefb6972","versionType":"git"},{"lessThan":"219c96de5d9b6b4af7e8576ad897b774cc3ee9a7","status":"affected","version":"02a52c5c8c3b8cbad0f12009cde9f36dbefb6972","versionType":"git"},{"lessThan":"e5c0235a3c4e9eb047a16cd02323fe4ecf2f570e","status":"affected","version":"02a52c5c8c3b8cbad0f12009cde9f36dbefb6972","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":"5.10"},{"lessThan":"5.10","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.266","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.217","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.184","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"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.266","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.217","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.184","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.153","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.105","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.46","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.10","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"5.10","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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->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."}],"providerMetadata":{"dateUpdated":"2026-09-03T08:26:34.396Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}],"title":"selinux: do not cancel a policy conversion that never started","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80756","datePublished":"2026-09-03T08:26:34.396Z","dateReserved":"2026-08-26T14:34:25.791Z","dateUpdated":"2026-09-03T08:26:34.396Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-03 13:06:15","lastModifiedDate":"2026-09-03 13:06:15","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80756","Ordinal":"1","Title":"selinux: do not cancel a policy conversion that never started","CVE":"CVE-2026-80756","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80756","Ordinal":"1","NoteData":"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->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.","Type":"Description","Title":"selinux: do not cancel a policy conversion that never started"}]}}}