What is CVE-2026-43231?

CVE-2026-43231 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Memory Leak flaw (CWE-401), affecting Linux kernel versions from 3.4 onward and patched in 5.10.252, 5.15.202, 6.1.165 and others. CVE-2026-43231 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-43231?

CVE-2026-43231 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-2026-43231?

Yes, CVE-2026-43231 has been patched. Fixed versions include 5.10.252, 5.15.202, 6.1.165 and others. If you are running Linux kernel 3.4 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-43231 actively exploited?

CVE-2026-43231 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Memory Leak (CWE-401)?

The product does not release memory after use, causing gradual resource exhaustion. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/401.html

CVE-2026-43231

Medium

In the Linux kernel, the following vulnerability has been resolved: media: radio-keene: fix memory leak in error path Fix a memory leak in usb_keene_probe(). The v4l2 control handler is initialized and controls are added, but if v4l2_device_register() or video_register_device() fails afterward, the handler was never freed, leaking memory. Add v4l2_ctrl_handler_free() call in the err_v4l2 error path to ensure the control handler is properly freed for all error paths after it is initialized.

Package Linux Kernel

Published 2026-05-06

Last modified 2026-05-08

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

Weakness type

CWE-401

CVE-2026-43231 is a Memory Leak vulnerability

What is Memory Leak?

The product does not release memory after use, causing gradual resource exhaustion. Learn more on MITRE CWE

Affected versions

Linux kernel versions 3.4 and later are affected. Fixed in 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.16, 6.19.6, 7.0 and their respective stable series.

Affected from

≥ 3.4

Fixed in

✓ 5.10.252 5.10.x ✓ 5.15.202 5.15.x ✓ 6.1.165 6.1.x ✓ 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

8 total

Kernel Git
https://git.kernel.org/stable/c/1d8558a232ecb187e8e0328d6347a125f437a0fc

Patch
Kernel Git
https://git.kernel.org/stable/c/242b0aabb1866024a7995a767ac330c158b39aa4

Patch
Kernel Git
https://git.kernel.org/stable/c/27c508f61963013fdf29097578284099ee7a85a4

Patch
Kernel Git
https://git.kernel.org/stable/c/2fe28a63d598235595a9601e0d8fdc7c8f4fd575

Patch
Kernel Git
https://git.kernel.org/stable/c/7fa9754f48cb8eefa566156be341e63d313247e5

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2026-43231

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-05-06

Modified 2026-05-08

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-43231?

CVE-2026-43231 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a Memory Leak flaw (CWE-401) . It affects Linux kernel versions from 3.4 onward and has been patched in 5.10.252, 5.15.202, 6.1.165 and others. CVE-2026-43231 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-43231?

CVE-2026-43231 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-2026-43231?

Yes. CVE-2026-43231 has been patched. Fixed versions include 5.10.252, 5.15.202, 6.1.165 and others. If you are running Linux kernel 3.4 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-43231 actively exploited?

No. CVE-2026-43231 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.