{"id":"CVE-2026-93784","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: validate IEs in cfg80211_wext_siwgenie()\n\nThe KASAN allocation trace shows that a malformed IE buffer is\nstored via SIOCSIWGENIE (cfg80211_wext_siwgenie…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: validate IEs in cfg80211_wext_siwgenie()\n\nThe KASAN allocation trace shows that a malformed IE buffer is\nstored via SIOCSIWGENIE (cfg80211_wext_siwgenie…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= f21293549f60f88c74fcb9944737f11048896dc4 < 269498ce6c1e2132b072aa0c8660404926008f03","Linux >= f21293549f60f88c74fcb9944737f11048896dc4 < 685082f4be77f4657b498ebbe9f942ef65c492cf","Linux >= f21293549f60f88c74fcb9944737f11048896dc4 < 8b921a8993469a3482e0c67b5ce5cb6ce93f5f61","Linux >= f21293549f60f88c74fcb9944737f11048896dc4 < d01f1600e8b075aa17adb751ac9881bb6ee40dcc","Linux >= f21293549f60f88c74fcb9944737f11048896dc4 < c970879e03b23a27df42caf7ba506485a165fb96","Linux >= f21293549f60f88c74fcb9944737f11048896dc4 < 01cc395cecfaa73134d39fb9a401d9605d8bb2c5","Linux >= f21293549f60f88c74fcb9944737f11048896dc4 < a2f5286ca4f304d3fd469f01b96b518608912a5c","Linux 2.6.32"],"published":"2026-09-24","updated":"2026-10-03","sourceUpdated":"2026-10-03T11:17:47.927","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93784","references":[{"url":"https://git.kernel.org/stable/c/01cc395cecfaa73134d39fb9a401d9605d8bb2c5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/269498ce6c1e2132b072aa0c8660404926008f03","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/685082f4be77f4657b498ebbe9f942ef65c492cf","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8b921a8993469a3482e0c67b5ce5cb6ce93f5f61","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a2f5286ca4f304d3fd469f01b96b518608912a5c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c970879e03b23a27df42caf7ba506485a165fb96","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d01f1600e8b075aa17adb751ac9881bb6ee40dcc","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00173,"epssPercentile":0.0662,"ingestedAt":"2026-09-24T16:47:15.904Z","slug":"CVE-2026-93784","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: validate IEs in cfg80211_wext_siwgenie()\n\nThe KASAN allocation trace shows that a malformed IE buffer is\nstored via SIOCSIWGENIE (cfg80211_wext_siwgenie()) without any\nvalidation. The crash trace shows that a subsequent SIOCSIWESSID\ntriggers a connection attempt which calls cfg80211_sme_get_conn_ies()\nto process the stored IE buffer, causing:\n\n - An out-of-bounds read in skip_ie() which reads ies[pos+1]\n   (the length byte) past the end of the 1-byte buffer.\n\n - An integer underflow in the memcpy size argument when offs\n   returned by ieee80211_ie_split() exceeds ies_len, causing\n   unsigned subtraction to wrap to SIZE_MAX and triggering a\n   fortify panic.\n\nFix this by validating the IE buffer in cfg80211_wext_siwgenie()\nbefore storing it.\n\n[drop unnecessary ie_len check, update commit message]\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}