What’s Vulnerable › Vulnerabilities

CVE-2026-23246: wifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-18 · updated 2026-06-17
• Weakness: CWE-129

Description

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.

Affected products

• Linux kernel: from 6.5.1 before 6.6.130; from 6.7 before 6.12.77; from 6.13 before 6.18.17; from 6.19 before 6.19.7; 6.5, 7.0-rc1 — fixed in 6.12.77, 6.18.17, 6.19.7, 6.6.130

How to fix

Upgrade to a fixed version: Linux kernel 6.12.77, 6.18.17, 6.19.7, 6.6.130. Check the vendor advisory for mitigations.

References

• 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

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