Improper Access Control in Linux kernel - CVE-2025-71270
Published: March 20, 2026
Vulnerability identifier: #VU124201
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-2025-71270
CWE-ID: CWE-284
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 error handling in the LoongArch BPF JIT exception recovery mechanism when processing memory access operations triggered by BPF_PROBE_MEM* instructions. A local user can execute a specially crafted BPF program to cause a denial of service.
The vulnerability specifically affects LoongArch architecture systems where BPF programs perform memory access operations that trigger ADEM exceptions. Proper fixup handling was missing in the architecture-specific trap handler prior to the patch.
How to mitigate CVE-2025-71270
Install security update from vendor's repository.