Race condition in Linux kernel - CVE-2026-64057
Published: July 20, 2026
Vulnerability identifier: #VU138575
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-64057
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper locking in afs_get_link() and AFS symbolic link handling when processing symbolic link access and validation. A local user can trigger concurrent symbolic link operations to cause a denial of service.
The issue involves races between multiple get_link() calls, missing RCU barriering during RCU pathwalk, and concurrent updates to symlink contents from server-side changes.
How to mitigate CVE-2026-64057
Install security update from vendor's repository.