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CVE-2026-46047

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net: qrtr: ns: Fix use-after-free in driver remove() In the remove callback, if a packet arrives after destroy_workqueue() is c…

Published May 27, 2026CWE-416EPSS 0.17%

Overview

CVE-2026-46047 is a high-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. 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:

net: qrtr: ns: Fix use-after-free in driver remove()

In the remove callback, if a packet arrives after destroy_workqueue() is

called, but before sock_release(), the qrtr_ns_data_ready() callback will

try to queue the work, causing use-after-free issue.

Fix this issue by saving the default 'sk_data_ready' callback during

qrtr_ns_init() and use it to replace the qrtr_ns_data_ready() callback at

the start of remove(). This ensures that even if a packet arrives after

destroy_workqueue(), the work struct will not be dereferenced.

Note that it is also required to ensure that the RX threads are completed

before destroying the workqueue, because the threads could be using the

qrtr_ns_data_ready() callback.

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/0f313eb6a8f6dffa491373cf3afab979fa1c02f4Refgit.kernel.org/stable/c/2e127ceb1c415e246076d8e09e23e443a7a2038fRefgit.kernel.org/stable/c/4ae0bd51bf7079e9c2a06b5de0ae04ba70d10167Refgit.kernel.org/stable/c/65168712c216584ff482a7d1a67589f2079b2634Refgit.kernel.org/stable/c/7809fea20c9404bfcfa6112ec08d1fe1d3520bebRefgit.kernel.org/stable/c/db3c60ec772de30acae92d560dfcc5258e58dbe8Refgit.kernel.org/stable/c/dff081c3602f2fd810f69ef47945a226980dd05dRefgit.kernel.org/stable/c/f96779e916576e81430ebb326baff6e433fef8ae

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46047?

CVE-2026-46047 is a high-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-46047?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-46047?

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-2026-46047?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46047 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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