Improper control of a resource through its lifetime in Linux kernel - CVE-2026-46057
Published: May 28, 2026
Vulnerability identifier: #VU132432
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-46057
CWE-ID: CWE-664
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause unexpected audit records.
The vulnerability exists due to improper state management in the Landlock credential blob handling across fork() when transferring credentials for a child process after muting subdomain logs without creating a domain. A local user can fork a process with crafted Landlock credential state to cause unexpected audit records.
The issue occurs when LOG_SUBDOMAINS_OFF is set through the ruleset_fd=-1 path, which commits the field without creating a Landlock domain.
Affected software
Linux kernel
Ubuntu
linux (Ubuntu package)
linux-azure (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-raspi (Ubuntu package)
Ubuntu
linux (Ubuntu package)
linux-azure (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-raspi (Ubuntu package)
How to mitigate CVE-2026-46057
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - update to 7.0.0-27.27
linux-azure (Ubuntu package) - addressed in versions 7.0.0-1009.9, 7.0.0-1010.10
linux-nvidia (Ubuntu package) - update to 7.0.0-1013.13
linux-raspi (Ubuntu package) - update to 7.0.0-1014.14
linux (Ubuntu package) - update to 7.0.0-27.27
linux-azure (Ubuntu package) - addressed in versions 7.0.0-1009.9, 7.0.0-1010.10
linux-nvidia (Ubuntu package) - update to 7.0.0-1013.13
linux-raspi (Ubuntu package) - update to 7.0.0-1014.14