Kernel out-of-bounds read via short TWT parameters
Published Aug 28, 2026 · Updated Aug 28, 2026
Out-of-bounds read in Linux mac80211 allows physically proximate attackers to trigger invalid kernel reads with a short individual TWT frame. ieee80211_s1g_rx_twt_setup passes a parameter block whose declared length is too short to drv_add_twt_setup, where the tracepoint and driver callback consume the full ieee80211_twt_params structure. Reachability requires receipt of a crafted Wi-Fi TWT setup action on the affected path; the resulting out-of-bounds read reaches at most 14 bytes, with no observed crash.
Summary
What happened
Out-of-bounds read in Linux mac80211 allows physically proximate attackers to trigger invalid kernel reads with a short individual TWT frame. ieee80211_s1g_rx_twt_setup passes a parameter block whose declared length is too short to drv_add_twt_setup, where the tracepoint and driver callback consume the full ieee80211_twt_params structure. Reachability requires receipt of a crafted Wi-Fi TWT setup action on the affected path; the resulting out-of-bounds read reaches at most 14 bytes, with no observed crash.
The record
- CVE
- CVE-2026-80722
- Published
- Aug 28, 2026
- Updated
- Aug 28, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 28, 2026CVE publishedPublication date reported by the CVE source.
- Aug 28, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=5.15
- Affected versionversion=f5a4c24e689f54e66201f04d343bdd2e8a1d7923 <0502d5077e419427d80f4d46ba95d0067f5fb916
- Affected versionversion=f5a4c24e689f54e66201f04d343bdd2e8a1d7923 <09d60d1f72e6598241490eb6c4e97245af895c09
- Affected versionversion=f5a4c24e689f54e66201f04d343bdd2e8a1d7923 <47fb04c3826e1f90271d405523043d6708b9072a
- Affected versionversion=f5a4c24e689f54e66201f04d343bdd2e8a1d7923 <92fcd0f30dc8e51f252589b082d46851d295cc1a
- Affected versionversion=f5a4c24e689f54e66201f04d343bdd2e8a1d7923 <ade9e2f0f7f4d3089600ac2af8ef0b91746f923b
- Affected versionversion=f5a4c24e689f54e66201f04d343bdd2e8a1d7923 <b558e07708d886acfcf4b0391ed7a8546e81d326
- Affected versionversion=f5a4c24e689f54e66201f04d343bdd2e8a1d7923 <ff558072d199c1d641d1561da622e67f780514de
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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