What’s Vulnerable › Vulnerabilities

CVE-2025-37796: wifi: at76c50x: fix use after free access in at76_disconnect

• Severity: high (CVSS 7.8 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: 2025-05-01 · updated 2026-06-17
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: at76c50x: fix use after free access in at76_disconnect The memory pointed to by priv is freed at the end of at76_delete_device function (using ieee80211_free_hw). But the code then accesses the udev field of the freed object to put the USB device. This may also lead to a memory leak of the usb device. Fix this by using udev from interface.

Affected products

• Linux kernel: from 3.17.1 before 5.4.293; from 5.5 before 5.10.237; from 5.11 before 5.15.181; from 5.16 before 6.1.135; from 6.2 before 6.6.88; from 6.7 before 6.12.25 — fixed in 5.10.237, 5.15.181, 5.4.293, 6.1.135, 6.12.25, 6.14.4

How to fix

Upgrade to a fixed version: Linux kernel 5.10.237, 5.15.181, 5.4.293, 6.1.135. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/152721cbae42713ecfbca6847e0f102ee6b19546
• https://git.kernel.org/stable/c/27c7e63b3cb1a20bb78ed4a36c561ea4579fd7da
• https://git.kernel.org/stable/c/3c619aec1f538333b56746d2f796aab1bca5c9a5
• https://git.kernel.org/stable/c/5e7df74745700f059dc117a620e566964a2e8f2c
• https://git.kernel.org/stable/c/6e4ab3e574c2a335b40fa1f70d1c54fcb58ab33f
• https://git.kernel.org/stable/c/7ca513631fa6ad3011b8b9197cdde0f351103704
• https://git.kernel.org/stable/c/a9682bfef2cf3802515a902e964d774e137be1b9
• https://git.kernel.org/stable/c/c731cdfddcf1be1590d5ba8c9b508f98e3a2b3d6
• https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
• https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

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