What is CVE-2026-31482?

CVE-2026-31482 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.4 onward and patched in 6.6.131, 6.12.80, 6.18.21 and others. CVE-2026-31482 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-31482?

CVE-2026-31482 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2026-31482?

Yes, CVE-2026-31482 has been patched. Fixed versions include 6.6.131, 6.12.80, 6.18.21 and others. If you are running Linux kernel 6.4 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-31482 actively exploited?

CVE-2026-31482 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-31482

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 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.

Package Linux Kernel

Published 2026-04-22

Last modified 2026-04-28

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Affected versions

Linux kernel versions 6.4 and later are affected. Fixed in 6.6.131, 6.12.80, 6.18.21, 6.19.11, 7.0 and their respective stable series.

Affected from

≥ 6.4

Fixed in

✓ 6.6.131 6.6.x ✓ 6.12.80 6.12.x ✓ 6.18.21 6.18.x ✓ 6.19.11 6.19.x ✓ 7.0

References

5 total

Kernel Git
https://git.kernel.org/stable/c/0738d395aab8fae3b5a3ad3fc640630c91693c27

Patch
Kernel Git
https://git.kernel.org/stable/c/7f4e3233faa8470dd0627bc49b2809f2bfebd909

Patch
Kernel Git
https://git.kernel.org/stable/c/95c899cd791803a5bf7b73e5994fbbe1cc1a9c36

Patch
Kernel Git
https://git.kernel.org/stable/c/99a8b420f3f0e162eb9c9c9253929d4d23f9bd30

Patch
Kernel Git
https://git.kernel.org/stable/c/a58d298a83a3a9b7ca99ded9d60a1e77231159ef

Patch

Details

CVE ID CVE-2026-31482

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-04-22

Modified 2026-04-28

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-31482?

CVE-2026-31482 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.4 onward and has been patched in 6.6.131, 6.12.80, 6.18.21 and others. CVE-2026-31482 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-31482?

CVE-2026-31482 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2026-31482?

Yes. CVE-2026-31482 has been patched. Fixed versions include 6.6.131, 6.12.80, 6.18.21 and others. If you are running Linux kernel 6.4 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-31482 actively exploited?

No. CVE-2026-31482 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.