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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-31482 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/0738d395aab8fae3b5a3ad3fc640630c91693c27 kernel.org Patch 
https://git.kernel.org/stable/c/7f4e3233faa8470dd0627bc49b2809f2bfebd909 kernel.org Patch 
https://git.kernel.org/stable/c/95c899cd791803a5bf7b73e5994fbbe1cc1a9c36 kernel.org Patch 
https://git.kernel.org/stable/c/99a8b420f3f0e162eb9c9c9253929d4d23f9bd30 kernel.org Patch 
https://git.kernel.org/stable/c/a58d298a83a3a9b7ca99ded9d60a1e77231159ef kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-noinfo Insufficient Information cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-31482
NVD Published Date:
04/22/2026
NVD Last Modified:
04/28/2026
Source:
kernel.org