What is CVE-2026-43243?

CVE-2026-43243 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.11 onward and patched in 6.12.75, 6.18.16, 6.19.6 and others. CVE-2026-43243 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-43243?

CVE-2026-43243 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-2026-43243?

Yes, CVE-2026-43243 has been patched. Fixed versions include 6.12.75, 6.18.16, 6.19.6 and others. If you are running Linux kernel 6.11 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-43243 actively exploited?

CVE-2026-43243 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-43243

Medium

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Add signal type check for dcn401 get_phyd32clk_src Trying to access link enc on a dpia link will cause a crash otherwise

Package Linux Kernel

Published 2026-05-06

Last modified 2026-05-11

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 6.11 and later are affected. Fixed in 6.12.75, 6.18.16, 6.19.6, 7.0 and their respective stable series.

Affected from

≥ 6.11

Fixed in

✓ 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-2026-43243 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/23e7150afc70da615857f9f07b494ec58540f096
Patch
Kernel patch commit
https://git.kernel.org/stable/c/486b2909ac284185900c06f05ffc6eca895f38b8
Patch
Kernel patch commit
https://git.kernel.org/stable/c/c979d8db7b0f293111f2e83795ea353c8ed75de9
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2026-43243

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-05-06

Modified 2026-05-11

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-43243?

CVE-2026-43243 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.11 onward and has been patched in 6.12.75, 6.18.16, 6.19.6 and others. CVE-2026-43243 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-43243?

CVE-2026-43243 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-2026-43243?

Yes — CVE-2026-43243 has been patched. Fixed versions include 6.12.75, 6.18.16, 6.19.6 and others. If you are running Linux kernel 6.11 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-43243 actively exploited?

No — CVE-2026-43243 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.