{"id":"CVE-2026-80722","state":"PUBLISHED","title":"wifi: mac80211: validate individual TWT params before driver setup","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: validate individual TWT params before driver setup\n\nieee80211_process_rx_twt_action() only partially validates a received\nS1G TWT setup frame before queueing it.\n\nAn individual agreement can therefore reach ieee80211_s1g_rx_twt_setup()\nwith twt->length too short for the full struct ieee80211_twt_params.\n\nThe individual path passes twt to drv_add_twt_setup(). Both the tracepoint\nand the driver callback consume the complete parameters block, not merely\nreq_type. Do not pass a short individual agreement to the driver.\nBroadcast agreements remain unchanged because they are rejected locally\nafter accessing only req_type.\n\n[edit commit message to not overclaim lack of validation nor\n understate driver impact]","publishedAt":"2026-08-28T06:53:17.886Z","updatedAt":"2026-10-16T19:26:35.418Z","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":"f5a4c24e689f54e66201f04d343bdd2e8a1d7923","status":"affected","lessThan":"92fcd0f30dc8e51f252589b082d46851d295cc1a","versionType":"git"},{"version":"f5a4c24e689f54e66201f04d343bdd2e8a1d7923","status":"affected","lessThan":"09d60d1f72e6598241490eb6c4e97245af895c09","versionType":"git"},{"version":"f5a4c24e689f54e66201f04d343bdd2e8a1d7923","status":"affected","lessThan":"ff558072d199c1d641d1561da622e67f780514de","versionType":"git"},{"version":"f5a4c24e689f54e66201f04d343bdd2e8a1d7923","status":"affected","lessThan":"ade9e2f0f7f4d3089600ac2af8ef0b91746f923b","versionType":"git"},{"version":"f5a4c24e689f54e66201f04d343bdd2e8a1d7923","status":"affected","lessThan":"b558e07708d886acfcf4b0391ed7a8546e81d326","versionType":"git"},{"version":"f5a4c24e689f54e66201f04d343bdd2e8a1d7923","status":"affected","lessThan":"47fb04c3826e1f90271d405523043d6708b9072a","versionType":"git"},{"version":"f5a4c24e689f54e66201f04d343bdd2e8a1d7923","status":"affected","lessThan":"0502d5077e419427d80f4d46ba95d0067f5fb916","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/s1g.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.15","versionType":"semver"},{"version":"5.15.216","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.151","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.103","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.44","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.8","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/s1g.c"]}],"references":["https://git.kernel.org/stable/c/92fcd0f30dc8e51f252589b082d46851d295cc1a","https://git.kernel.org/stable/c/09d60d1f72e6598241490eb6c4e97245af895c09","https://git.kernel.org/stable/c/ff558072d199c1d641d1561da622e67f780514de","https://git.kernel.org/stable/c/ade9e2f0f7f4d3089600ac2af8ef0b91746f923b","https://git.kernel.org/stable/c/b558e07708d886acfcf4b0391ed7a8546e81d326","https://git.kernel.org/stable/c/47fb04c3826e1f90271d405523043d6708b9072a","https://git.kernel.org/stable/c/0502d5077e419427d80f4d46ba95d0067f5fb916"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80722.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80722","state":"PUBLISHED","datePublished":"2026-08-28T06:53:17.886Z","dateUpdated":"2026-10-16T19:26:35.418Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.788Z"},"containers":{"cna":{"title":"wifi: mac80211: validate individual TWT params before driver setup","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: validate individual TWT params before driver setup\n\nieee80211_process_rx_twt_action() only partially validates a received\nS1G TWT setup frame before queueing it.\n\nAn individual agreement can therefore reach ieee80211_s1g_rx_twt_setup()\nwith twt->length too short for the full struct ieee80211_twt_params.\n\nThe individual path passes twt to drv_add_twt_setup(). Both the tracepoint\nand the driver callback consume the complete parameters block, not merely\nreq_type. Do not pass a short individual agreement to the driver.\nBroadcast agreements remain unchanged because they are rejected locally\nafter accessing only req_type.\n\n[edit commit message to not overclaim lack of validation nor\n understate driver impact]"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f5a4c24e689f54e66201f04d343bdd2e8a1d7923","status":"affected","lessThan":"92fcd0f30dc8e51f252589b082d46851d295cc1a","versionType":"git"},{"version":"f5a4c24e689f54e66201f04d343bdd2e8a1d7923","status":"affected","lessThan":"09d60d1f72e6598241490eb6c4e97245af895c09","versionType":"git"},{"version":"f5a4c24e689f54e66201f04d343bdd2e8a1d7923","status":"affected","lessThan":"ff558072d199c1d641d1561da622e67f780514de","versionType":"git"},{"version":"f5a4c24e689f54e66201f04d343bdd2e8a1d7923","status":"affected","lessThan":"ade9e2f0f7f4d3089600ac2af8ef0b91746f923b","versionType":"git"},{"version":"f5a4c24e689f54e66201f04d343bdd2e8a1d7923","status":"affected","lessThan":"b558e07708d886acfcf4b0391ed7a8546e81d326","versionType":"git"},{"version":"f5a4c24e689f54e66201f04d343bdd2e8a1d7923","status":"affected","lessThan":"47fb04c3826e1f90271d405523043d6708b9072a","versionType":"git"},{"version":"f5a4c24e689f54e66201f04d343bdd2e8a1d7923","status":"affected","lessThan":"0502d5077e419427d80f4d46ba95d0067f5fb916","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/s1g.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.15","versionType":"semver"},{"version":"5.15.216","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.151","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.103","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.44","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.8","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/s1g.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/92fcd0f30dc8e51f252589b082d46851d295cc1a"},{"url":"https://git.kernel.org/stable/c/09d60d1f72e6598241490eb6c4e97245af895c09"},{"url":"https://git.kernel.org/stable/c/ff558072d199c1d641d1561da622e67f780514de"},{"url":"https://git.kernel.org/stable/c/ade9e2f0f7f4d3089600ac2af8ef0b91746f923b"},{"url":"https://git.kernel.org/stable/c/b558e07708d886acfcf4b0391ed7a8546e81d326"},{"url":"https://git.kernel.org/stable/c/47fb04c3826e1f90271d405523043d6708b9072a"},{"url":"https://git.kernel.org/stable/c/0502d5077e419427d80f4d46ba95d0067f5fb916"}],"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 - Malformed S1G TWT setup action frames reach mac80211 via normal WiFi RX (driver -> ieee80211_rx_h_action -> ieee80211_process_rx_twt_action -> ieee80211_s1g_rx_twt_setup); an adjacent attacker within radio range sends crafted 802.11 management frames to a vulnerable AP.\nAC:L - The attacker fully controls the TWT element length and payload; ieee80211_process_rx_twt_action() only validates two bytes of req_type before queueing, so a short individual agreement reliably reaches drv_add_twt_setup() without races or victim-specific timing.\nPR:N - No Linux privileges on the victim AP are required; exploitation needs only normal 802.11 association as a WiFi client to an S1G AP with twt_responder enabled and a driver implementing add_twt_setup (e.g. MediaTek mt7915/mt7996).\nUI:N - No deliberate victim action is needed beyond operating an S1G AP that accepts associated stations; the attacker directly injects the malformed TWT setup frame and mac80211 processes it automatically on receive.\nS:U - Impact is kernel/driver heap memory corruption on the AP host within the same security authority; it does not cross VM, IOMMU, or sandbox boundaries (standard kernel compromise scope).\nC:H - drv_add_twt_setup(), its tracepoint, and driver callbacks read the full ieee80211_twt_params (twt, min_twt_dur, mantissa, channel) beyond the validated skb bounds, causing out-of-bounds reads of adjacent skb/heap memory that can disclose kernel data.\nI:H - MediaTek add_twt_setup() handlers write twt_agrt fields (req_type, min_twt_dur, twt) past the undersized params block into skb tail/heap memory, providing out-of-bounds write primitives exploitable for further memory corruption or code execution.\nA:H - Out-of-bounds access in mac80211/driver TWT setup can kernel-oops the AP or hang/crash WiFi firmware when corrupted parameters are programmed into hardware TWT state from attacker-controlled short frames."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-29T06:22:38.281Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"5.15.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.6.151"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.12.103"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.18.44"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"7.1.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-80722","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T19:20:57.406511Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-16T19:26:35.418Z"}}]}}}