Out-of-bounds write in Linux kernel - CVE-2026-31505
Published: April 24, 2026
Vulnerability identifier: #VU127639
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-31505
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 a denial of service.
The vulnerability exists due to out-of-bounds write in iavf_get_ethtool_stats() when handling concurrent ethtool channel and statistics operations. A local user can issue crafted ethtool requests to cause a denial of service.
The issue can be triggered when "ethtool -L" and "ethtool -S" are executed simultaneously during queue reconfiguration.
How to mitigate CVE-2026-31505
Install security update from vendor's repository.