What is CVE-2026-23149?

CVE-2026-23149 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.18 onward and patched in 6.18.9 and 6.19. CVE-2026-23149 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-23149?

CVE-2026-23149 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-2026-23149?

Yes, CVE-2026-23149 has been patched. Fixed versions include 6.18.9 and 6.19. If you are running Linux kernel 6.18 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-23149 actively exploited?

CVE-2026-23149 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-23149

Medium

In the Linux kernel, the following vulnerability has been resolved: drm: Do not allow userspace to trigger kernel warnings in drm_gem_change_handle_ioctl() Since GEM bo handles are u32 in the uapi and the internal implementation uses idr_alloc() which uses int ranges, passing a new handle larger than INT_MAX trivially triggers a kernel warning: idr_alloc(): ... if (WARN_ON_ONCE(start < 0)) return -EINVAL; ... Fix it by rejecting new handles above INT_MAX and at the same time make the end limit calculation more obvious by moving into int domain.

Package Linux Kernel

Published 2026-02-14

Last modified 2026-03-17

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 6.18 and later are affected. Fixed in 6.18.9, 6.19 and their respective stable series.

Affected from

≥ 6.18

Fixed in

✓ 6.18.9 6.18.x ✓ 6.19

References

The following references provide additional information about CVE-2026-23149 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/12f15d52d38ac53f7c70ea3d4b3d76afed04e064
Patch
Kernel patch commit
https://git.kernel.org/stable/c/ae8831ee0fb2f5f41f39722e7b3749d65bb78d08
Patch

Details

CVE ID CVE-2026-23149

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-02-14

Modified 2026-03-17

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-23149?

CVE-2026-23149 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.18 onward and has been patched in 6.18.9 and 6.19. CVE-2026-23149 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-23149?

CVE-2026-23149 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-2026-23149?

Yes — CVE-2026-23149 has been patched. Fixed versions include 6.18.9 and 6.19. If you are running Linux kernel 6.18 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-23149 actively exploited?

No — CVE-2026-23149 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.