What’s Vulnerable › Vulnerabilities

CVE-2025-37973: wifi: cfg80211: fix out-of-bounds access during multi-link element defragmentation

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-20 · updated 2026-10-15
• Weakness: CWE-125

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: fix out-of-bounds access during multi-link element defragmentation Currently during the multi-link element defragmentation process, the multi-link element length added to the total IEs length when calculating the length of remaining IEs after the multi-link element in cfg80211_defrag_mle(). This could lead to out-of-bounds access if the multi-link element or its corresponding fragment elements are the last elements in the IEs buffer. To address this issue, correctly calculate the remaining IEs length by deducting the multi-link element end offset from total IEs end offset.

Affected products

• Linux kernel: from 6.5 before 6.6.91; from 6.7 before 6.12.29; from 6.13 before 6.14.7; 6.15-rc1, 6.15-rc2, 6.15-rc3, 6.15-rc4, 6.15-rc5 — fixed in 6.12.29, 6.14.7, 6.6.91

How to fix

Upgrade to a fixed version: Linux kernel 6.12.29, 6.14.7, 6.6.91. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/023c1f2f0609218103cbcb48e0104b144d4a16dc
• https://git.kernel.org/stable/c/73dde269a1a43e6b1aa92eba13ad2df58bfdd38e
• https://git.kernel.org/stable/c/9423f6da825172b8dc60d4688ed3d147291c3be9
• https://git.kernel.org/stable/c/e1c6d0c6199bd5f4cfc7a66ae7032b6e805f904d

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