5.5

CVE-2026-31482

s390/entry: Scrub r12 register on kernel entry

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
LinuxLinux Kernel Version >= 6.4.1 < 6.6.131
LinuxLinux Kernel Version >= 6.7 < 6.12.80
LinuxLinux Kernel Version >= 6.13 < 6.18.21
LinuxLinux Kernel Version >= 6.19 < 6.19.11
LinuxLinux Kernel Version6.4 Update-
LinuxLinux Kernel Version7.0 Updaterc1
LinuxLinux Kernel Version7.0 Updaterc2
LinuxLinux Kernel Version7.0 Updaterc3
LinuxLinux Kernel Version7.0 Updaterc4
LinuxLinux Kernel Version7.0 Updaterc5
LinuxLinux Kernel Version7.0 Updaterc6
LinuxLinux Kernel Version7.0 Updaterc7
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.01% 0.022
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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