wifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration link_id is taken from the ML Reconfiguration element (control & 0x000f), so it can be 0..15. link_removal_timeout[] has IEEE80211_MLD_MAX_NUM_LINKS (15) elements, so index 15 is out-of-bounds. Skip subelements with link_id >= IEEE80211_MLD_MAX_NUM_LINKS to avoid a stack out-of-bounds write.
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration link_id is taken from the ML Reconfiguration element (control & 0x000f), so it can be 0..15. link_removal_timeout[] has IEEE80211_MLD_MAX_NUM_LINKS (15) elements, so index 15 is out-of-bounds. Skip subelements with link_id >= IEEE80211_MLD_MAX_NUM_LINKS to avoid a stack out-of-bounds write.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/162d331d833dc73a3e905a24c44dd33732af1fc5
- https://git.kernel.org/stable/c/650981e718e68005ca2760a6358134b8a98ebea4
- https://git.kernel.org/stable/c/bfde158d5d1322c0c2df398a8d1ccce04943be2e
- https://git.kernel.org/stable/c/d58d71c2167601762351962b9604808d3be94400
- https://git.kernel.org/stable/c/f35ceec54d48e227fa46f8f97fd100a77b8eab15
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23246.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-23246