Out-of-bounds read in Linux kernel - CVE-2026-80943
Published: September 13, 2026
Vulnerability identifier: #VU149453
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80943
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to read memory out of bounds.
The vulnerability exists due to improper index validation in rtl92du_tx_fill_desc() when processing an 802.11 header with a QoS TID greater than 8. A local user can provide an 802.11 header with a QoS TID greater than 8 to read memory out of bounds.
Affected software
Linux kernel
How to mitigate CVE-2026-80943
Install security update from vendor's repository.