Out-of-bounds write in Linux kernel - CVE-2026-90399
Published: September 18, 2026
Vulnerability identifier: #VU151079
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90399
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause memory corruption.
The vulnerability exists due to an allocation-size and pointer-stride mismatch in ath12k_wmi_mac_phy_caps_parse() when processing short firmware TLVs. A local user can trigger an out-of-bounds write to cause memory corruption.
Affected software
Linux kernel
How to mitigate CVE-2026-90399
Install security update from vendor's repository.