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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-46267
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-03 18:16:28 UTC
Updated2026-07-22 20:10:00 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

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

EPSS: 0.000130000 probability, percentile 0.024050000 (date 2026-06-11)

Problem Types: CWE-416

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 4a61cd6687fc6348d08724676d34e38160d6cf9b c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e git Not specified
CNA Linux Linux affected 4a61cd6687fc6348d08724676d34e38160d6cf9b a24a676329d40481b2331bfa1418a679577dfd3a git Not specified
CNA Linux Linux affected 4a61cd6687fc6348d08724676d34e38160d6cf9b 77eef9f2eef045c3c37a3df82d3e661afb866b98 git Not specified
CNA Linux Linux affected 4a61cd6687fc6348d08724676d34e38160d6cf9b cf70cedce327833296ebe6043364d1e44b76a2ab git Not specified
CNA Linux Linux affected 4a61cd6687fc6348d08724676d34e38160d6cf9b 276820278e9717cc7d4bb32381892dd3ddf418d4 git Not specified
CNA Linux Linux affected 4a61cd6687fc6348d08724676d34e38160d6cf9b 1cb97b1225450af3f7b728777929ba50c6a58ced git Not specified
CNA Linux Linux affected 4a61cd6687fc6348d08724676d34e38160d6cf9b c9efde1e537baed7648a94022b43836a348a074f git Not specified
CNA Linux Linux affected 3.7 Not specified
CNA Linux Linux unaffected 3.7 semver Not specified
CNA Linux Linux unaffected 5.15.202 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.165 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.128 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.75 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.14 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.4 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/cf70cedce327833296ebe6043364d1e44b76a2ab 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a24a676329d40481b2331bfa1418a679577dfd3a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/1cb97b1225450af3f7b728777929ba50c6a58ced 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c9efde1e537baed7648a94022b43836a348a074f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/77eef9f2eef045c3c37a3df82d3e661afb866b98 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/276820278e9717cc7d4bb32381892dd3ddf418d4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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