CVE-2026-23121

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The Linux kernel contains a data race condition around dev->work within the mISDN module. Specifically, dev->work can be read locklessly in the mISDN read() and mISDN poll() functions. The issue involves a write to memory location 0xffff88812d848280 by task 10864 and a subsequent read from the same location by task 10857, leading to a potential data race. The vulnerability was addressed by adding READ ONCE() and WRITE ONCE() annotations.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.