CVE-2024-50235: linux kernel Double Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: clear wdev->cqm_config pointer on free When we free wdev->cqm_config when unregistering, we also need to clear out the pointer since the same wdev/netdev may get re-registered in another network namespace, then destroyed later, running this code again, which results in a double-free.

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-415 CWE-415

Affected Products

Vendor	Product	Versions
linux	linux_kernel	6.1.57 — 6.1.116
linux	linux_kernel	6.5.7 — 6.6
linux	linux_kernel	6.6 — 6.6.60
linux	linux_kernel	6.7 — 6.11.7
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/64e4c45d23cd7f6167f69cc2d2877bc7f54292e5 https://git.kernel.org/stable/c/6c44abb2d4c3262737d5d67832daebc8cf48b8c9 https://git.kernel.org/stable/c/ba392e1355ba74b1d4fa11b85f71ab6ed7ecc058 https://git.kernel.org/stable/c/d5fee261dfd9e17b08b1df8471ac5d5736070917

Other References

https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Frequently Asked Questions

What is CVE-2024-50235? +

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: clear wdev->cqm_config pointer on free When we free wdev->cqm_config when unregistering, we also need to clear out the pointer since the same wdev/netdev may get re-registered in another network namespace, then destroyed later, running this code again, which results in a double-free. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-50235? +

CVE-2024-50235 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-50235? +

CVE-2024-50235 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-50235? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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