SB2025091966 - Use-after-free in Linux kernel brcm80211 brcmfmac driver
Published: September 19, 2025 Updated: September 22, 2025
Security Bulletin ID
SB2025091966
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2022-50408)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the brcmf_netdev_start_xmit() function in drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/1613a7b24f1a7467cb727ba3ec77c9a808383560
- https://git.kernel.org/stable/c/232d59eca07f6ea27307022a33d226aff373bd02
- https://git.kernel.org/stable/c/27574a3f421c3a1694d0207f37c6bbf23d66978e
- https://git.kernel.org/stable/c/3f42faf6db431e04bf942d2ebe3ae88975723478
- https://git.kernel.org/stable/c/49c742afd60f552fce7799287080db02bffe1db2
- https://git.kernel.org/stable/c/c369836cff98d3877f98c98e15c0151462812d96
- https://git.kernel.org/stable/c/d79f4d903e14dde822c60b5fd3bedc5a289d25df
- https://git.kernel.org/stable/c/e01d96494a9de0f48b1167f0494f6d929fa773ed
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.150