SB2026092576 - Out-of-bounds read in Linux kernel wireless

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-93784)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper validation of information element buffers in cfg80211_wext_siwgenie() when storing a malformed buffer through SIOCSIWGENIE. A local user can submit a malformed information element buffer and trigger a connection attempt to cause a denial of service.

The issue is triggered when a subsequent SIOCSIWESSID operation initiates connection processing.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/01cc395cecfaa73134d39fb9a401d9605d8bb2c5
• https://git.kernel.org/stable/c/a2f5286ca4f304d3fd469f01b96b518608912a5c
• https://git.kernel.org/stable/c/c970879e03b23a27df42caf7ba506485a165fb96