SB20260727361 - Out-of-bounds read in Linux kernel mac80211

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-64223)

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

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in ieee80211_parse_neg_ttlm() when parsing negotiated TTLM elements with sparse link-map presence bits. A remote attacker can send a specially crafted negotiated TTLM element to disclose sensitive information.

The read data is written into negotiated link-map fields but is gated by valid_links before any driver state is affected.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/2becaaeebe230ade1fcd5d0f1cde4d6ee93ec78f
• https://git.kernel.org/stable/c/2dd9304727c7041df0a599595910bdbe02ad03c5
• https://git.kernel.org/stable/c/a6e6ccd5bd07155c2add6c74ce1a5e68ad3b95ea
• https://git.kernel.org/stable/c/f7d395dc5008168ac5b9c1ac2791e59a6078cca1