What is CVE-2026-43430?

CVE-2026-43430 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.7 out of 10, classified as a Race Condition flaw (CWE-362), affecting Linux kernel versions from 2.6.37 onward and patched in 5.10.253, 5.15.203, 6.1.167 and others. CVE-2026-43430 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-43430?

CVE-2026-43430 has a CVSS score of 4.7 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2026-43430?

Yes, CVE-2026-43430 has been patched. Fixed versions include 5.10.253, 5.15.203, 6.1.167 and others. If you are running Linux kernel 2.6.37 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-43430 actively exploited?

CVE-2026-43430 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/362.html

CVE-2026-43430

Medium

In the Linux kernel, the following vulnerability has been resolved: usb: yurex: fix race in probe The bbu member of the descriptor must be set to the value standing for uninitialized values before the URB whose completion handler sets bbu is submitted. Otherwise there is a window during which probing can overwrite already retrieved data.

Package Linux Kernel

Published 2026-05-08

Last modified 2026-05-20

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

4.7

out of 10

Medium

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-362

CVE-2026-43430 is a Race Condition vulnerability

What is Race Condition?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. Learn more on MITRE CWE

Affected versions

Linux kernel versions 2.6.37 and later are affected. Fixed in 5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.78, 6.18.19, 6.19.9, 7.0 and their respective stable series.

Affected from

≥ 2.6.37

Fixed in

✓ 5.10.253 5.10.x ✓ 5.15.203 5.15.x ✓ 6.1.167 6.1.x ✓ 6.6.130 6.6.x ✓ 6.12.78 6.12.x ✓ 6.18.19 6.18.x ✓ 6.19.9 6.19.x ✓ 7.0

References

The following references provide additional information about CVE-2026-43430 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/3cec135415a89723e2d38e1c8cc5098203355965
Patch
Kernel patch commit
https://git.kernel.org/stable/c/687d26d43a5aaf44323ce7d601cf242bb87e9559
Patch
Kernel patch commit
https://git.kernel.org/stable/c/7a875c09899ba0404844abfd8f0d54cdc481c151
Patch

8 patch commits total View all on NVD

Details

CVE ID CVE-2026-43430

Severity Medium

CVSS score 4.7 / 10

CVSS version 3.1

Published 2026-05-08

Modified 2026-05-20

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-43430?

CVE-2026-43430 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.7 out of 10 , classified as a Race Condition flaw (CWE-362) . It affects Linux kernel versions from 2.6.37 onward and has been patched in 5.10.253, 5.15.203, 6.1.167 and others. CVE-2026-43430 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-43430?

CVE-2026-43430 has a CVSS score of 4.7 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2026-43430?

Yes — CVE-2026-43430 has been patched. Fixed versions include 5.10.253, 5.15.203, 6.1.167 and others. If you are running Linux kernel 2.6.37 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-43430 actively exploited?

No — CVE-2026-43430 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. View CWE-362 on MITRE CWE →