{"id":"CVE-2026-89954","summary":"mtd: afs: validate v2 image info bounds","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: afs: validate v2 image info bounds\n\nThe AFS v2 parser uses footer[8] to locate the image information block\ninside the current erase block, then uses the image information\nregion_count to walk entries from a fixed local array. The footer offset\nand region count come from flash contents and are not checked against the\nerase block or the local image-info array before use.\n\nReject v2 entries whose image information offset would underflow the\nerase block calculation, and reject region counts that cannot fit in the\nlocal image-info array before walking region entries.","modified":"2026-09-17T03:47:20.401172934Z","published":"2026-09-16T10:32:38.355Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89954.json","cna_assigner":"Linux"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/18916f475057cbd2fb8ea6ae86e6b85884ad1d53"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1bec05a68414cf8d0cab6cb42445b8603f32ffc4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1edea8900ca3e405c1421d8b5c29f97107874f72"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3ad8ff12fd44b08af9212ac4883a7e29d2ab7348"},{"type":"WEB","url":"https://git.kernel.org/stable/c/875daa3c750814ff2e2dc050239c390048f0bcd0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d14e6298139f58a87a87d7022e26a7f37f0ddce7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/da740539e8f370767317e24615349b9342a6e773"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e9290031f736e99ad17c25c00311c92c266843b7"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89954.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89954"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b7cf5e2830bbb128699d7635ce8404b7f605bc95"},{"fixed":"1bec05a68414cf8d0cab6cb42445b8603f32ffc4"},{"fixed":"3ad8ff12fd44b08af9212ac4883a7e29d2ab7348"},{"fixed":"875daa3c750814ff2e2dc050239c390048f0bcd0"},{"fixed":"da740539e8f370767317e24615349b9342a6e773"},{"fixed":"1edea8900ca3e405c1421d8b5c29f97107874f72"},{"fixed":"18916f475057cbd2fb8ea6ae86e6b85884ad1d53"},{"fixed":"d14e6298139f58a87a87d7022e26a7f37f0ddce7"},{"fixed":"e9290031f736e99ad17c25c00311c92c266843b7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89954.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.2.0"},{"fixed":"5.10.270"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.221"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.51"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89954.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H"}]}