SB2026060430 - Uncontrolled Recursion in Linux kernel nfs
Published: June 4, 2026
Security Bulletin ID
SB2026060430
CSH 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 vulnerability.
1) Uncontrolled Recursion (CVE-ID: CVE-2026-46256)
CWE-ID: CWE-674 - Uncontrolled Recursion
CVSSv4: 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
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to uncontrolled recursion in NFS LOCALIO when triggering direct reclaim recursion into NFS via nfs_writepages. A local user can perform local NFS LOCALIO write or commit operations to cause a denial of service.
The issue occurs in loopback mount configurations where the NFS client and server are on the same system.
Remediation
Install update from vendor's website.