{"schema":"threatline.record/2","record":{"id":"CVE-2026-98703","aliases":[],"summary":"wifi: mac80211: minstrel_ht: validate fixed rate index","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: minstrel_ht: validate fixed rate index\n\nThe fixed_rate_idx debugfs file is a plain u32 attribute, so any value\ncan be written to it.  minstrel_ht_update_stats() then copies the value\ninto mi->max_tp_rate[] and mi->max_prob_rate, and\nminstrel_ht_set_rate() uses MI_RATE_GROUP()/MI_RATE_IDX() to index\nminstrel_mcs_groups[] (42 entries) and mi->groups[].rates[] (10 entries)\nwith it.\n\nWriting e.g. 65535 selects group 4095 and rate index 15, far outside\nboth arrays.  The out-of-bounds entries are dereferenced and updated as\nstruct minstrel_rate_stats (retry counts, etc.), so the invalid index\ncorrupts adjacent kernel memory.  With CONFIG_UBSAN_BOUNDS the access is\nreported as an array-index-out-of-bounds in minstrel_ht_set_rate().\n\nOnly a valid group/rate pair, or U32_MAX to disable fixed rate\nprocessing, can be used safely, so reject any other value when the\ndebugfs file is written.\n\nThe file is only reachable through a root-only debugfs mount, so this is\nnot a privilege boundary.  The out-of-bounds access is still a bug that\nmust not be reachable through a writable debugfs attribute.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98703","source_modified_at":"2026-10-21T12:55:51.935Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"24f7580e852b5472b51eea322bb78454df0054b8","lessThan":"eebc70f132041b35da9ec74d5d395083125289b2","status":"affected","versionType":"git"},{"version":"24f7580e852b5472b51eea322bb78454df0054b8","lessThan":"f8ab6ae1fa360b0191252677f41e781dcb0ffe6e","status":"affected","versionType":"git"},{"version":"24f7580e852b5472b51eea322bb78454df0054b8","lessThan":"42aa9feb27b600809414a3c6b0c650bafba542a9","status":"affected","versionType":"git"},{"version":"24f7580e852b5472b51eea322bb78454df0054b8","lessThan":"43082d604a9937b94ceb2e484403956d0f363324","status":"affected","versionType":"git"},{"version":"24f7580e852b5472b51eea322bb78454df0054b8","lessThan":"15fb9e3cea55fbc378261ce35a32b0f8828f0000","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98703","source_modified_at":"2026-10-21T12:55:51.935Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"3.1","status":"affected"},{"version":"0","lessThan":"3.1","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.113","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.56","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.10","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98703","source_modified_at":"2026-10-21T12:55:51.935Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"42aa9feb27b600809414a3c6b0c650bafba542a9","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98703","source_modified_at":"2026-10-21T12:55:51.935Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"43082d604a9937b94ceb2e484403956d0f363324","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98703","source_modified_at":"2026-10-21T12:55:51.935Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"15fb9e3cea55fbc378261ce35a32b0f8828f0000","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.002,"percentile":0.09314,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:46:33.395Z","modified_at":"2026-10-21T12:55:51.935Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98703","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:55:51.935Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98703","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/eebc70f132041b35da9ec74d5d395083125289b2"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/f8ab6ae1fa360b0191252677f41e781dcb0ffe6e"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/42aa9feb27b600809414a3c6b0c650bafba542a9"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/43082d604a9937b94ceb2e484403956d0f363324"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/15fb9e3cea55fbc378261ce35a32b0f8828f0000"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-21T12:55:51.935Z","content_hash":"b6ddc5615de03fe3d177b19b47d79bfea1ab1fe6a9c6520ebdbd94d60a616ef5"}}