Improper locking in Linux kernel - CVE-2026-45901
Published: May 28, 2026
Vulnerability identifier: #VU132587
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-2026-45901
CWE-ID: CWE-667
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 nf_tables reset path when nft reset, ipset list, and iptables-nft with '-m set' rule run concurrently. A local user can trigger concurrent operations to cause a denial of service.
The issue results from a circular lock dependency involving commit_mutex, nfnl_subsys_ipset, and nlk_cb_mutex.
How to mitigate CVE-2026-45901
Install security update from vendor's repository.