{"api_version":"1","generated_at":"2026-09-03T23:59:02+00:00","cve":"CVE-2026-80755","urls":{"html":"https://cve.report/CVE-2026-80755","api":"https://cve.report/api/cve/CVE-2026-80755.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80755","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80755"},"summary":{"title":"selinux: reject a permission value exceeding the class permission count","description":"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]","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/a7f3d4f22d920dc3c7d75f02ece0f7bf2c58437e","name":"https://git.kernel.org/stable/c/a7f3d4f22d920dc3c7d75f02ece0f7bf2c58437e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6c2ab7c4549f4f2305848df834e784651dbf1676","name":"https://git.kernel.org/stable/c/6c2ab7c4549f4f2305848df834e784651dbf1676","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d14b5d0e97fccd27974fedc03b903408872907fd","name":"https://git.kernel.org/stable/c/d14b5d0e97fccd27974fedc03b903408872907fd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dfc59a062c386d3d4415ecdab781065a645f33cc","name":"https://git.kernel.org/stable/c/dfc59a062c386d3d4415ecdab781065a645f33cc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80755","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80755","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 6c2ab7c4549f4f2305848df834e784651dbf1676 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 dfc59a062c386d3d4415ecdab781065a645f33cc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 a7f3d4f22d920dc3c7d75f02ece0f7bf2c58437e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 d14b5d0e97fccd27974fedc03b903408872907fd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.23","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.23 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.108 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.49 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.13 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":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["security/selinux/ss/policydb.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"6c2ab7c4549f4f2305848df834e784651dbf1676","status":"affected","version":"55fcf09b3fe4325c9395ebbb0322a547a157ebc7","versionType":"git"},{"lessThan":"dfc59a062c386d3d4415ecdab781065a645f33cc","status":"affected","version":"55fcf09b3fe4325c9395ebbb0322a547a157ebc7","versionType":"git"},{"lessThan":"a7f3d4f22d920dc3c7d75f02ece0f7bf2c58437e","status":"affected","version":"55fcf09b3fe4325c9395ebbb0322a547a157ebc7","versionType":"git"},{"lessThan":"d14b5d0e97fccd27974fedc03b903408872907fd","status":"affected","version":"55fcf09b3fe4325c9395ebbb0322a547a157ebc7","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["security/selinux/ss/policydb.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.23"},{"lessThan":"2.6.23","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.108","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.49","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.13","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":"6.12.108","versionStartIncluding":"2.6.23","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.49","versionStartIncluding":"2.6.23","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.13","versionStartIncluding":"2.6.23","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"2.6.23","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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]"}],"providerMetadata":{"dateUpdated":"2026-09-03T08:26:33.797Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/6c2ab7c4549f4f2305848df834e784651dbf1676"},{"url":"https://git.kernel.org/stable/c/dfc59a062c386d3d4415ecdab781065a645f33cc"},{"url":"https://git.kernel.org/stable/c/a7f3d4f22d920dc3c7d75f02ece0f7bf2c58437e"},{"url":"https://git.kernel.org/stable/c/d14b5d0e97fccd27974fedc03b903408872907fd"}],"title":"selinux: reject a permission value exceeding the class permission count","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80755","datePublished":"2026-09-03T08:26:33.797Z","dateReserved":"2026-08-26T14:34:25.790Z","dateUpdated":"2026-09-03T08:26:33.797Z","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":"80755","Ordinal":"1","Title":"selinux: reject a permission value exceeding the class permissio","CVE":"CVE-2026-80755","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80755","Ordinal":"1","NoteData":"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]","Type":"Description","Title":"selinux: reject a permission value exceeding the class permissio"}]}}}