Use-after-free in Linux kernel - CVE-2026-31501
Published: April 24, 2026
Vulnerability identifier: #VU127647
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2026-31501
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free in the RX path timestamp handling in the icssg-prueth driver when processing received packets through the timestamp path. A local user can trigger packet processing that reaches the timestamp path to cause a denial of service.
Affected software
Linux kernel
Ubuntu
linux-azure-6.17 (Ubuntu package)
linux-oracle-6.17 (Ubuntu package)
linux-nvidia-6.17 (Ubuntu package)
Ubuntu
linux-azure-6.17 (Ubuntu package)
linux-oracle-6.17 (Ubuntu package)
linux-nvidia-6.17 (Ubuntu package)
How to mitigate CVE-2026-31501
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux-azure-6.17 (Ubuntu package) - addressed in versions 6.17.0-42.42+1, 6.17.0-1019.22, 6.17.0-1022.22, 6.17.0-1022.25, 6.17.0-1032.32
linux-oracle-6.17 (Ubuntu package) - update to 6.17.0-1020.20
linux-nvidia-6.17 (Ubuntu package) - update to 6.17.0-1031.31
linux-azure-6.17 (Ubuntu package) - addressed in versions 6.17.0-42.42+1, 6.17.0-1019.22, 6.17.0-1022.22, 6.17.0-1022.25, 6.17.0-1032.32
linux-oracle-6.17 (Ubuntu package) - update to 6.17.0-1020.20
linux-nvidia-6.17 (Ubuntu package) - update to 6.17.0-1031.31