Use-after-free in Linux kernel - CVE-2026-72125
Published: August 16, 2026
Vulnerability identifier: #VU143469
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-2026-72125
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 a use-after-free race in the Linux kernel CAN ISO-TP socket handling in net/can/isotp.c when releasing a socket concurrently with NETDEV_UNREGISTER. A local user can trigger concurrent socket release and device unregistration to cause a denial of service.
The issue can leave a stale CAN filter referencing a freed socket.
Affected software
Linux kernel
Ubuntu
linux-nvidia-tegra (Ubuntu package)
Ubuntu
linux-nvidia-tegra (Ubuntu package)
How to mitigate CVE-2026-72125
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux-nvidia-tegra (Ubuntu package) - update to 6.8.0-1035.38
linux-nvidia-tegra (Ubuntu package) - update to 6.8.0-1035.38
External References
- https://git.kernel.org/stable/c/0b811c4bbe3ec9ad611e90a540fe8b51b3bb8a96
- https://git.kernel.org/stable/c/20bab8b88baac140ca3701116e1d486c7f51e311
- https://git.kernel.org/stable/c/43884dc7963beef2328f507f4fe680bdc173eb80
- https://git.kernel.org/stable/c/7bef39ba76eb7307ed22a50329e0f5776dbeda58
- https://git.kernel.org/stable/c/e442b62ba5a7756c17e05a77b32cdd085a2b6138