Race condition in Linux kernel - CVE-2026-72124
Published: August 16, 2026
Vulnerability identifier: #VU143468
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-2026-72124
CWE-ID: CWE-362
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 race condition in the can isotp socket transmission state machine in net/can/isotp.c when handling concurrent send, receive, echo, timer, and socket release events. A local user can trigger concurrent state transitions to cause a denial of service.
The issue affects TX state handling across sendmsg(), the RX path, and hrtimer callbacks.
Affected software
Linux kernel
Ubuntu
linux-nvidia-tegra (Ubuntu package)
Ubuntu
linux-nvidia-tegra (Ubuntu package)
How to mitigate CVE-2026-72124
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/0b05eca9589f609e2491b528dccf683168a4cda8
- https://git.kernel.org/stable/c/37beb16e08cae94cc05840c7274225e3b0b38ae7
- https://git.kernel.org/stable/c/4f1fdf1a1c317bcac0c6b6c8e12642c9983de1ca
- https://git.kernel.org/stable/c/a7d90e7b5e75d7406c889fe36e9a61ee364a00cb
- https://git.kernel.org/stable/c/cf070fe33bfbd1a4c21236078fadb35dd223a157