What is CVE-2026-31612?

CVE-2026-31612 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10, affecting Linux kernel versions from 5.15 onward and patched in 6.1.175, 6.6.136, 6.12.83 and others. CVE-2026-31612 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-31612?

CVE-2026-31612 has a CVSS score of 7.5 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Is there a patch available for CVE-2026-31612?

Yes, CVE-2026-31612 has been patched. Fixed versions include 6.1.175, 6.6.136, 6.12.83 and others. If you are running Linux kernel 5.15 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-31612 actively exploited?

CVE-2026-31612 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-31612

High

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate EaNameLength in smb2_get_ea() smb2_get_ea() reads ea_req->EaNameLength from the client request and passes it directly to strncmp() as the comparison length without verifying that the length of the name really is the size of the input buffer received. Fix this up by properly checking the size of the name based on the value received and the overall size of the request, to prevent a later strncmp() call to use the length as a "trusted" size of the buffer. Without this check, uninitialized heap values might be slowly leaked to the client.

Package Linux Kernel

Published 2026-04-24

Last modified 2026-06-01

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.5

out of 10

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Vector string

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

Affected versions

Linux kernel versions 5.15 and later are affected. Fixed in 6.1.175, 6.6.136, 6.12.83, 6.18.24, 6.19.14, 7.0.1, 7.1-rc1 and their respective stable series.

Affected from

≥ 5.15

Fixed in

✓ 6.1.175 6.1.x ✓ 6.6.136 6.6.x ✓ 6.12.83 6.12.x ✓ 6.18.24 6.18.x ✓ 6.19.14 6.19.x ✓ 7.0.1 7.0.x ✓ 7.1-rc1

References

The following references provide additional information about CVE-2026-31612 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/243b206bcb5a7137e8bddd57b2eec81e1ebd3859
Patch
Kernel patch commit
https://git.kernel.org/stable/c/3363a770b193f555f29d76ddf4ced3305c0ccf6d
Patch
Kernel patch commit
https://git.kernel.org/stable/c/4b73376feecb3b61172fe5b4ff42bbbb8531669d
Patch

7 patch commits total View all on NVD

Details

CVE ID CVE-2026-31612

Severity High

CVSS score 7.5 / 10

CVSS version 3.1

Published 2026-04-24

Modified 2026-06-01

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-31612?

CVE-2026-31612 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10 . It affects Linux kernel versions from 5.15 onward and has been patched in 6.1.175, 6.6.136, 6.12.83 and others. CVE-2026-31612 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-31612?

CVE-2026-31612 has a CVSS score of 7.5 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Is there a patch available for CVE-2026-31612?

Yes — CVE-2026-31612 has been patched. Fixed versions include 6.1.175, 6.6.136, 6.12.83 and others. If you are running Linux kernel 5.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-31612 actively exploited?

No — CVE-2026-31612 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.