What is CVE-2026-23364?

CVE-2026-23364 is a High severity Linux kernel vulnerability with a CVSS score of 7.4 out of 10, affecting Linux kernel versions from 5.15 onward and patched in 6.1.167, 6.6.130, 6.12.78 and others. CVE-2026-23364 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-23364?

CVE-2026-23364 has a CVSS score of 7.4 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

Is there a patch available for CVE-2026-23364?

Yes, CVE-2026-23364 has been patched. Fixed versions include 6.1.167, 6.6.130, 6.12.78 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-2026-23364 actively exploited?

CVE-2026-23364 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-23364

High

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Compare MACs in constant time To prevent timing attacks, MAC comparisons need to be constant-time. Replace the memcmp() with the correct function, crypto_memneq().

Package Linux Kernel

Published 2026-03-25

Last modified 2026-04-24

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.4

out of 10

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Vector string

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

Affected versions

Linux kernel versions 5.15 and later are affected. Fixed in 6.1.167, 6.6.130, 6.12.78, 6.18.19, 6.19.7, 7.0 and their respective stable series.

Affected from

≥ 5.15

Fixed in

✓ 6.1.167 6.1.x ✓ 6.6.130 6.6.x ✓ 6.12.78 6.12.x ✓ 6.18.19 6.18.x ✓ 6.19.7 6.19.x ✓ 7.0

References

The following references provide additional information about CVE-2026-23364 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/2cdc56ed67615ba0921383a688f24415ebe065f3
Patch
Kernel patch commit
https://git.kernel.org/stable/c/307afccb751f542246bd5dc68a2c1ffe1a78418c
Patch
Kernel patch commit
https://git.kernel.org/stable/c/93c0a22fec914ec4b697e464895a0f594e29fb28
Patch

6 patch commits total View all on NVD

Details

CVE ID CVE-2026-23364

Severity High

CVSS score 7.4 / 10

CVSS version 3.1

Published 2026-03-25

Modified 2026-04-24

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-23364?

CVE-2026-23364 is a High severity Linux kernel vulnerability with a CVSS score of 7.4 out of 10 . It affects Linux kernel versions from 5.15 onward and has been patched in 6.1.167, 6.6.130, 6.12.78 and others. CVE-2026-23364 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-23364?

CVE-2026-23364 has a CVSS score of 7.4 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
Is there a patch available for CVE-2026-23364?

Yes — CVE-2026-23364 has been patched. Fixed versions include 6.1.167, 6.6.130, 6.12.78 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-2026-23364 actively exploited?

No — CVE-2026-23364 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.