GHSA-2rvp-wpqf-89pf

GHSA-2rvp-wpqf-89pf PUBLISHED CVSS 5.5 MEDIUM

Record from GitHub Advisory Database · Published April 22, 2026

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.

Risk scores

CVSS 3.1

5.5

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Timeline

Apr 22, 2026 CVE Published
May 7, 2026 Security Advisory

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vulnetix vdb fixes GHSA-2rvp-wpqf-89pf

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