{"cve":"CVE-2026-80755","nvd":{"published":"2026-09-03T13:06:15.247","modified":"2026-10-21T13:19:59.760","status":"Received","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]","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/6c2ab7c4549f4f2305848df834e784651dbf1676","https://git.kernel.org/stable/c/9a1bd9fd1326655dfc31b18ca92ea8433cb31204","https://git.kernel.org/stable/c/a7f3d4f22d920dc3c7d75f02ece0f7bf2c58437e","https://git.kernel.org/stable/c/d14b5d0e97fccd27974fedc03b903408872907fd","https://git.kernel.org/stable/c/dfc59a062c386d3d4415ecdab781065a645f33cc"],"products":[],"source":"nvd","synced_at":"2026-10-22T16:41:11.231219466+00:00"},"epss":{"cve":"CVE-2026-80755","score":0.00157,"percentile":0.0479,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}