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CVE-2026-46267

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: nfc: hci: shdlc: Stop timers and work before freeing context llc_shdlc_deinit() purges SHDLC skb queues and frees the llc_shdlc…

Published Jun 3, 2026CWE-416EPSS 0.18%

Overview

CVE-2026-46267 is a high-severity vulnerability. It was published on June 3, 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:

nfc: hci: shdlc: Stop timers and work before freeing context

llc_shdlc_deinit() purges SHDLC skb queues and frees the llc_shdlc

structure while its timers and state machine work may still be active.

Timer callbacks can schedule sm_work, and sm_work accesses SHDLC state

and the skb queues. If teardown happens in parallel with a queued/running

work item, it can lead to UAF and other shutdown races.

Stop all SHDLC timers and cancel sm_work synchronously before purging the

queues and freeing the context.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

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/1cb97b1225450af3f7b728777929ba50c6a58cedRefgit.kernel.org/stable/c/276820278e9717cc7d4bb32381892dd3ddf418d4Refgit.kernel.org/stable/c/77eef9f2eef045c3c37a3df82d3e661afb866b98Refgit.kernel.org/stable/c/a24a676329d40481b2331bfa1418a679577dfd3aRefgit.kernel.org/stable/c/c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6eRefgit.kernel.org/stable/c/c9efde1e537baed7648a94022b43836a348a074fRefgit.kernel.org/stable/c/cf70cedce327833296ebe6043364d1e44b76a2ab

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46267?

CVE-2026-46267 is a high-severity vulnerability. It was published on June 3, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-46267?

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-2026-46267?

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-2026-46267?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46267 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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