{"id":"CVE-2026-74336","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: bound S1G TIM PVB walk to the TIM element\n\nieee80211_s1g_check_tim() parses the S1G Partial Virtual Bitmap (PVB) of a\nreceived TIM element","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: bound S1G TIM PVB walk to the TIM element\n\nieee80211_s1g_check_tim() parses the S1G Partial Virtual Bitmap (PVB) of a\nreceived TIM element. The TIM is h…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= e0c47c6229c25b54440fe1f84a0ff533942290b1 < 68cf46755894d495b432e21f9e25637030d8b075","Linux >= e0c47c6229c25b54440fe1f84a0ff533942290b1 < 3abc13ec3ac28c343ad7e7b7496e807b924f0edd","Linux >= e0c47c6229c25b54440fe1f84a0ff533942290b1 < b224d18b1e5d1cddfc67f63f41d80023b2ec8889","Linux 6.18"],"published":"2026-08-15","updated":"2026-10-15","sourceUpdated":"2026-10-15T11:17:45.190","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74336","references":[{"url":"https://git.kernel.org/stable/c/3abc13ec3ac28c343ad7e7b7496e807b924f0edd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/68cf46755894d495b432e21f9e25637030d8b075","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b224d18b1e5d1cddfc67f63f41d80023b2ec8889","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00198,"epssPercentile":0.08884,"ingestedAt":"2026-10-15T11:00:41.679Z","slug":"CVE-2026-74336","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: bound S1G TIM PVB walk to the TIM element\n\nieee80211_s1g_check_tim() parses the S1G Partial Virtual Bitmap (PVB) of a\nreceived TIM element. The TIM is handed in as the element payload:\nieee802_11_parse_elems_full() stores elems->tim = elem->data and\nelems->tim_len = elem->datalen (net/mac80211/parse.c), so the valid bytes\nare [tim, tim + tim_len).\n\nWhen walking the encoded blocks the function passes the walker an end\nsentinel of (const u8 *)tim + tim_len + 2, i.e. two bytes past the end of\nthe element. ieee80211_s1g_find_target_block() loops while (ptr + 1 <= end)\nand dereferences ptr (and the per-mode ieee80211_s1g_len_*() helpers read\n*ptr), so it can read up to two bytes beyond the TIM element -- an\nout-of-bounds read of adjacent skb/heap data when the TIM is the last\nelement in the frame. The +2 appears to account for the element id/len\nheader, but tim already points past that header at the element payload, so\nthe addend is wrong.\n\nPass the correct element end, (const u8 *)tim + tim_len.\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":[]}