SB20260507256 - Out-of-bounds read in Linux kernel brcm80211 brcmfmac driver
Published: May 7, 2026
Security Bulletin ID
SB20260507256
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2026-43110)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to an out-of-bounds read in brcmf_fweh_handle_if_event() when handling firmware-provided IF events. A remote attacker can supply a crafted bsscfg index to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/1ae1e1caa428844e481231f6dbe9b4f475f1d52d
- https://git.kernel.org/stable/c/304950a467d83678bd0b0f46331882e2ac23b12d
- https://git.kernel.org/stable/c/3ec7437e9d11374105c2c4e47ae671537729d7e6
- https://git.kernel.org/stable/c/9fca68c2512a362cad258e4df12a307bb2ee4b8e
- https://git.kernel.org/stable/c/b427c2b05222db36d32ee141609de6128e9091bb