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Vulnerability record · CVE-2026-46267 · published 3 June 2026

CVE-2026-46267: Linux kernel use after free vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.18% · top 93.6% CWE-416 · Use after free
7.8CVSS 3.1 base score
0.18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References
22 Jul 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/1cb97b1225450af3f7b728777929ba50c6a58ced Patch
https://git.kernel.org/stable/c/276820278e9717cc7d4bb32381892dd3ddf418d4 Patch
https://git.kernel.org/stable/c/77eef9f2eef045c3c37a3df82d3e661afb866b98 Patch
https://git.kernel.org/stable/c/a24a676329d40481b2331bfa1418a679577dfd3a Patch
https://git.kernel.org/stable/c/c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e Patch
https://git.kernel.org/stable/c/c9efde1e537baed7648a94022b43836a348a074f Patch
https://git.kernel.org/stable/c/cf70cedce327833296ebe6043364d1e44b76a2ab Patch

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Source: NIST National Vulnerability Database (record CVE-2026-46267), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.