What is CVE-2026-31693?

CVE-2026-31693 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 6.6.32 onward and patched in 6.6.128, 6.12.75, 6.18.16 and others. CVE-2026-31693 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-31693?

CVE-2026-31693 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-31693?

Yes, CVE-2026-31693 has been patched. Fixed versions include 6.6.128, 6.12.75, 6.18.16 and others. If you are running Linux kernel 6.6.32 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-31693 actively exploited?

CVE-2026-31693 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-31693

High

In the Linux kernel, the following vulnerability has been resolved: cifs: some missing initializations on replay In several places in the code, we have a label to signify the start of the code where a request can be replayed if necessary. However, some of these places were missing the necessary reinitializations of certain local variables before replay. This change makes sure that these variables get initialized after the label.

Package Linux Kernel

Published 2026-04-30

Last modified 2026-05-07

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-908

CVE-2026-31693 is classified as CWE-908

See CWE-908 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 6.6.32, 6.8 and later are affected. Fixed in 6.6.128, 6.12.75, 6.18.16, 6.19.6, 7.0 and their respective stable series.

Affected from

≥ 6.6.32 ≥ 6.8

Fixed in

✓ 6.6.128 6.6.x ✓ 6.12.75 6.12.x ✓ 6.18.16 6.18.x ✓ 6.19.6 6.19.x ✓ 7.0

References

The following references provide additional information about CVE-2026-31693 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/14f66f44646333d2bfd7ece36585874fd72f8286
Patch
Kernel patch commit
https://git.kernel.org/stable/c/1d731e512134495e0ef490ade0e4d91dc0d515ec
Patch
Kernel patch commit
https://git.kernel.org/stable/c/7c9ce68192eef14c777cb6ce17155d2eb2431aea
Patch

5 patch commits total View all on NVD

Details

CVE ID CVE-2026-31693

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-04-30

Modified 2026-05-07

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-31693?

CVE-2026-31693 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 6.6.32 onward and has been patched in 6.6.128, 6.12.75, 6.18.16 and others. CVE-2026-31693 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-31693?

CVE-2026-31693 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-31693?

Yes — CVE-2026-31693 has been patched. Fixed versions include 6.6.128, 6.12.75, 6.18.16 and others. If you are running Linux kernel 6.6.32 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-31693 actively exploited?

No — CVE-2026-31693 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.