SB2025012052 - Reachable assertion in Linux kernel overlayfs
Published: January 20, 2025 Updated: May 11, 2025
Security Bulletin ID
SB2025012052
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Reachable assertion (CVE-ID: CVE-2025-21654)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to reachable assertion within the ovl_connect_layer(), ovl_check_encode_origin(), ovl_dentry_to_fid() and ovl_encode_fh() functions in fs/overlayfs/export.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/3c7c90274ae339e1ad443c9be1c67a20b80b9c76
- https://git.kernel.org/stable/c/a1a541fbfa7e97c1100144db34b57553d7164ce5
- https://git.kernel.org/stable/c/c45beebfde34aa71afbc48b2c54cdda623515037
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.72
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.73
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.74