Improper locking in Linux kernel - CVE-2026-53084
Published: June 25, 2026
Vulnerability identifier: #VU135234
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-2026-53084
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 lock handling in the bpf task_vma iterator when executing a BPF program that iterates task VMAs. A local user can trigger lock ordering conditions to cause a denial of service.
The issue arises because the iterator held a per-VMA lock across the BPF program body, creating a lock ordering problem involving vm_lock, i_rwsem, and mmap_lock.
How to mitigate CVE-2026-53084
Install security update from vendor's repository.