{"id":"CVE-2026-23246","state":"PUBLISHED","title":"wifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration\n\nlink_id is taken from the ML Reconfiguration element (control & 0x000f),\nso it can be 0..15. link_removal_timeout[] has IEEE80211_MLD_MAX_NUM_LINKS\n(15) elements, so index 15 is out-of-bounds. Skip subelements with\nlink_id >= IEEE80211_MLD_MAX_NUM_LINKS to avoid a stack out-of-bounds\nwrite.","publishedAt":"2026-03-18T10:05:08.312Z","updatedAt":"2026-08-05T12:20:55.228Z","severity":{"score":8.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c","status":"affected","lessThan":"650981e718e68005ca2760a6358134b8a98ebea4","versionType":"git"},{"version":"8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c","status":"affected","lessThan":"bfde158d5d1322c0c2df398a8d1ccce04943be2e","versionType":"git"},{"version":"8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c","status":"affected","lessThan":"f35ceec54d48e227fa46f8f97fd100a77b8eab15","versionType":"git"},{"version":"8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c","status":"affected","lessThan":"d58d71c2167601762351962b9604808d3be94400","versionType":"git"},{"version":"8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c","status":"affected","lessThan":"162d331d833dc73a3e905a24c44dd33732af1fc5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/mlme.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.5","versionType":"semver"},{"version":"6.6.130","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.77","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.17","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.7","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/mlme.c"]}],"references":["https://git.kernel.org/stable/c/650981e718e68005ca2760a6358134b8a98ebea4","https://git.kernel.org/stable/c/bfde158d5d1322c0c2df398a8d1ccce04943be2e","https://git.kernel.org/stable/c/f35ceec54d48e227fa46f8f97fd100a77b8eab15","https://git.kernel.org/stable/c/d58d71c2167601762351962b9604808d3be94400","https://git.kernel.org/stable/c/162d331d833dc73a3e905a24c44dd33732af1fc5"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23246.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23246","state":"PUBLISHED","datePublished":"2026-03-18T10:05:08.312Z","dateUpdated":"2026-08-05T12:20:55.228Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-01-13T15:37:45.989Z"},"containers":{"cna":{"title":"wifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration\n\nlink_id is taken from the ML Reconfiguration element (control & 0x000f),\nso it can be 0..15. link_removal_timeout[] has IEEE80211_MLD_MAX_NUM_LINKS\n(15) elements, so index 15 is out-of-bounds. Skip subelements with\nlink_id >= IEEE80211_MLD_MAX_NUM_LINKS to avoid a stack out-of-bounds\nwrite."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c","status":"affected","lessThan":"650981e718e68005ca2760a6358134b8a98ebea4","versionType":"git"},{"version":"8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c","status":"affected","lessThan":"bfde158d5d1322c0c2df398a8d1ccce04943be2e","versionType":"git"},{"version":"8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c","status":"affected","lessThan":"f35ceec54d48e227fa46f8f97fd100a77b8eab15","versionType":"git"},{"version":"8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c","status":"affected","lessThan":"d58d71c2167601762351962b9604808d3be94400","versionType":"git"},{"version":"8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c","status":"affected","lessThan":"162d331d833dc73a3e905a24c44dd33732af1fc5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/mlme.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.5","versionType":"semver"},{"version":"6.6.130","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.77","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.17","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.7","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/mlme.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/650981e718e68005ca2760a6358134b8a98ebea4"},{"url":"https://git.kernel.org/stable/c/bfde158d5d1322c0c2df398a8d1ccce04943be2e"},{"url":"https://git.kernel.org/stable/c/f35ceec54d48e227fa46f8f97fd100a77b8eab15"},{"url":"https://git.kernel.org/stable/c/d58d71c2167601762351962b9604808d3be94400"},{"url":"https://git.kernel.org/stable/c/162d331d833dc73a3e905a24c44dd33732af1fc5"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:A - The vulnerability is triggered by processing crafted WiFi beacon frames received over the air. The attacker must be within WiFi range of the victim device (adjacent network).\nAC:L - The attacker can reliably trigger this by broadcasting crafted beacon frames with a spoofed BSSID containing a malicious ML Reconfiguration element. No special conditions beyond WiFi proximity are needed once the victim is associated.\nPR:N - No privileges or authentication are required. WiFi beacon frames are unencrypted management frames that any device in range can inject by spoofing the associated AP's BSSID.\nUI:N - No user interaction is required. The victim device automatically processes beacon frames from its associated AP while connected to a WiFi network.\nS:U - The vulnerability affects the kernel itself; exploitation stays within the same security authority (kernel context). There is no crossing of a virtualization or sandbox boundary.\nC:H - This is a stack-based out-of-bounds write where the attacker controls the written value. Stack corruption can be leveraged to read arbitrary memory through carefully crafted exploitation techniques.\nI:H - The stack-based buffer overflow allows the attacker to write a controlled 2-byte value past the array bounds on the stack, potentially corrupting return addresses or other stack data, which can lead to arbitrary code execution in kernel context.\nA:H - The stack corruption will at minimum cause a kernel crash/oops, resulting in a denial of service. Stack buffer overflows reliably crash the kernel when they corrupt critical stack data."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T12:20:55.228Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"6.6.130"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"6.12.77"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"6.18.17"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"6.19.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}