Uncontrolled Recursion in Linux kernel - CVE-2026-46256
Published: June 4, 2026
Vulnerability identifier: #VU133334
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-46256
CWE-ID: CWE-674
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-46256
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.115-2
linux (Debian package) - update to 6.12.115-2