SB20260824240 - Race condition in Linux kernel tracefs

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-74605)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 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]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a race condition in eventfs inode handling in fs/tracefs/event_inode.c when iterating over the SRCU-protected children list during inode freeing. A local user can trigger concurrent eventfs operations to cause a denial of service.

The issue occurs because a freed inode can be observed with its children list reused as an RCU head, causing iteration to read an invalid list target.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/004f7232e49730448f91665e76bdd7dff8e0c638
• https://git.kernel.org/stable/c/f0ece16ffca7384787b692431961ce202907acf5