Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2026-31482

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: s390/entry: Scrub r12 register on kernel entry Before commit f33f2d4c7c80 ("s390/bp: remove TIF_ISOLATE_BP"), all entry handler…

Published Apr 22, 2026EPSS 0.16%

Overview

CVE-2026-31482 is a medium-severity vulnerability. It was published on April 22, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

s390/entry: Scrub r12 register on kernel entry

Before commit f33f2d4c7c80 ("s390/bp: remove TIF_ISOLATE_BP"),

all entry handlers loaded r12 with the current task pointer

(lg %r12,__LC_CURRENT) for use by the BPENTER/BPEXIT macros. That

commit removed TIF_ISOLATE_BP, dropping both the branch prediction

macros and the r12 load, but did not add r12 to the register clearing

sequence.

Add the missing xgr %r12,%r12 to make the register scrub consistent

across all entry points.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/0738d395aab8fae3b5a3ad3fc640630c91693c27Refgit.kernel.org/stable/c/7f4e3233faa8470dd0627bc49b2809f2bfebd909Refgit.kernel.org/stable/c/95c899cd791803a5bf7b73e5994fbbe1cc1a9c36Refgit.kernel.org/stable/c/99a8b420f3f0e162eb9c9c9253929d4d23f9bd30Refgit.kernel.org/stable/c/a58d298a83a3a9b7ca99ded9d60a1e77231159ef

How CyberStrike helps

Frequently asked questions

What is CVE-2026-31482?

CVE-2026-31482 is a medium-severity vulnerability. It was published on April 22, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-31482?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-31482?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-31482?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-31482 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related MEDIUM CVEs from 2026

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999