Out-of-bounds write in Linux kernel - CVE-2026-90142
Published: September 19, 2026
Vulnerability identifier: #VU151350
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90142
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to write past the end of the XSK buffer array.
The vulnerability exists due to an out-of-bounds write in the virtio_net RX ring resize handling when resizing the RX ring while an AF_XDP socket is attached. A local user can resize the RX ring to write past the end of the XSK buffer array.
Affected software
Linux kernel
How to mitigate CVE-2026-90142
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3