Out-of-bounds write in Linux kernel - CVE-2026-23262
Published: March 20, 2026
Vulnerability identifier: #VU124186
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-23262
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause memory corruption and incorrect statistics reporting.
The vulnerability exists due to improper buffer size management in the gve driver's statistics reporting region when changing the number of queues. A local user can trigger a queue count change to cause the NIC to write past the allocated stats region or create gaps in stats reporting.
The issue arises because the driver and NIC miscalculate offsets into the shared memory region during queue count changes, potentially leading to memory corruption or incorrect statistics.
How to mitigate CVE-2026-23262
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/11f8311f69e4c361717371b4901ff92daeb76e9c
- https://git.kernel.org/stable/c/7b9ebcce0296e104a0d82a6b09d68564806158ff
- https://git.kernel.org/stable/c/837c662f47dac43efa1aef2dd433c6b4b4c073af
- https://git.kernel.org/stable/c/9d93332397405b62a3300b22d04ac65d990b91ff
- https://git.kernel.org/stable/c/9fa0a755db3e1945fe00f73fe27d85ef6c8818b7
- https://git.kernel.org/stable/c/df54838ab61826ecc1a562ffa5e280c3ab7289a7
- https://git.kernel.org/stable/c/f432f7613c220db32c2c6942420daf7b3f2e7d7e