What is CVE-2026-31628?

CVE-2026-31628 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 3.16.58 onward and patched in 5.10.253, 5.15.203, 6.1.169 and others. CVE-2026-31628 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-31628?

CVE-2026-31628 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-2026-31628?

Yes, CVE-2026-31628 has been patched. Fixed versions include 5.10.253, 5.15.203, 6.1.169 and others. If you are running Linux kernel 3.16.58 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-31628 actively exploited?

CVE-2026-31628 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-31628

Medium

In the Linux kernel, the following vulnerability has been resolved: x86/CPU: Fix FPDSS on Zen1 Zen1's hardware divider can leave, under certain circumstances, partial results from previous operations. Those results can be leaked by another, attacker thread. Fix that with a chicken bit.

Package Linux Kernel

Published 2026-04-24

Last modified 2026-04-27

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 3.16.58, 4.4.144, 4.9.102, 4.14 and later are affected. Fixed in 5.10.253, 5.15.203, 6.1.169, 6.6.135, 6.12.82, 6.18.23, 6.19.13, 7.0.1, 7.1-rc1 and their respective stable series.

Affected from

≥ 3.16.58 ≥ 4.4.144 ≥ 4.9.102 ≥ 4.14

Fixed in

✓ 5.10.253 5.10.x ✓ 5.15.203 5.15.x ✓ 6.1.169 6.1.x ✓ 6.6.135 6.6.x ✓ 6.12.82 6.12.x ✓ 6.18.23 6.18.x ✓ 6.19.13 6.19.x ✓ 7.0.1 7.0.x ✓ 7.1-rc1

References

The following references provide additional information about CVE-2026-31628 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/0548529af20e68c6552817834b766646dd3bd7a7
Patch
Kernel patch commit
https://git.kernel.org/stable/c/1272cfedf4cd1019ddf583917a99b62f2d3645bb
Patch
Kernel patch commit
https://git.kernel.org/stable/c/546785c719418c6166834a47e372a88f5f7ae893
Patch

9 patch commits total View all on NVD

Details

CVE ID CVE-2026-31628

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-04-24

Modified 2026-04-27

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-31628?

CVE-2026-31628 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 3.16.58 onward and has been patched in 5.10.253, 5.15.203, 6.1.169 and others. CVE-2026-31628 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-31628?

CVE-2026-31628 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-2026-31628?

Yes — CVE-2026-31628 has been patched. Fixed versions include 5.10.253, 5.15.203, 6.1.169 and others. If you are running Linux kernel 3.16.58 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-31628 actively exploited?

No — CVE-2026-31628 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.