PT-2026-26113 · Linux · Linux Kernel

Published 2025-01-01 · Updated 2026-05-21 · CVE-2025-71270

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The Linux kernel contains an issue related to exception handling within the LoongArch BPF JIT compiler. Specifically, the kernel did not proactively call the common fixup routine to recover from recoverable memory access errors (ADEM exceptions) generated by BPF PROBE MEM* instructions. This impacted the ability to handle exceptions during memory access operations performed by BPF programs. The do ade() function was updated to fix EX TYPE BPF memory access exceptions for BPF programs, ensuring safer execution. Test cases involving illegal address access in module attach and subprogs extable of selftests/bpf were used to validate the fix.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

BDU:2026-04166

CVE-2025-71270

Affected Products

Linux Kernel

References · 23

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71270.json · Exploit
• https://git.kernel.org/stable/c/73ede654d9daa2ee41bdd17bc62946fc5a0258cb · Patch
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2404-CVE-2025-71270 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-04166 · Security Note
• https://git.kernel.org/stable/c/c2ed4f71e9288f21d5c53ff790270758e60fa5f9 · Patch
• https://git.kernel.org/stable/c/c49a28068363f3dca439aa5fe4d3b1f8159809fe · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-71270 · Vendor Advisory
• https://git.kernel.org/stable/c/9bdc1ab5e4ce6f066119018d8f69631a46f9c5a0 · Patch
• https://cve.org/CVERecord?id=CVE-2025-71270 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-71270 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2025-71270 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2025-71270 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-71270 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-71270 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2025-71270 · Vendor Advisory