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CVE-2026-43223

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: media: pvrusb2: fix URB leak in pvr2_send_request_ex When pvr2_send_request_ex() submits a write URB successfully but fails to…

Published May 6, 2026CWE-401EPSS 0.16%

Overview

CVE-2026-43223 is a medium-severity vulnerability. It was published on May 6, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

media: pvrusb2: fix URB leak in pvr2_send_request_ex

When pvr2_send_request_ex() submits a write URB successfully but fails to

submit the read URB (e.g. returns -ENOMEM), it returns immediately without

waiting for the write URB to complete. Since the driver reuses the same

URB structure, a subsequent call to pvr2_send_request_ex() attempts to

submit the still-active write URB, triggering a 'URB submitted while

active' warning in usb_submit_urb().

Fix this by ensuring the write URB is unlinked and waited upon if the read

URB submission fails.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/2011929f0e4cf6a0a34dd6205911b12276904453Refgit.kernel.org/stable/c/4ba5c7a1aade7090172cbffd4d120bf4cf5ccbdeRefgit.kernel.org/stable/c/58dd722b6c3debcddb4684fb256c90fee7f063e5Refgit.kernel.org/stable/c/5f3ac816861c3b8a5d1a3645b17dc3a99d668d94Refgit.kernel.org/stable/c/77a63f8efc434ddb04667ed632aade58301a2f13Refgit.kernel.org/stable/c/a8333c8262aed2aedf608c18edd39cf5342680a7Refgit.kernel.org/stable/c/cf459d6ffa5e150ef3744b897f936ff24b52bd15Refgit.kernel.org/stable/c/da524c939b1e5ba17f10db4bde4bdaf569ffcda6

How CyberStrike helps

Frequently asked questions

What is CVE-2026-43223?

CVE-2026-43223 is a medium-severity vulnerability. It was published on May 6, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-43223?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-43223?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-43223?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-43223 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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