CVE-2026-46267

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 v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2026-06-03 18:16

Updated : 2026-07-22 20:10

NVD link : CVE-2026-46267

Mitre link : CVE-2026-46267

CVE.ORG link : CVE-2026-46267

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-416

Use After Free

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If teardown happens in parallel with a queued/running\nwork item, it can lead to UAF and other shutdown races.\n\nStop all SHDLC timers and cancel sm_work synchronously before purging the\nqueues and freeing the context.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnfc: hci: shdlc: Detener temporizadores y trabajo antes de liberar el contexto\n\nllc_shdlc_deinit() purga las colas skb de SHDLC y libera la estructura llc_shdlc mientras sus temporizadores y el trabajo de la m\u00e1quina de estados a\u00fan pueden estar activos.\n\nLas devoluciones de llamada del temporizador pueden programar sm_work, y sm_work accede al estado de SHDLC y a las colas skb. Si el desmantelamiento ocurre en paralelo con un elemento de trabajo en cola/en ejecuci\u00f3n, puede llevar a UAF y otras condiciones de carrera de apagado.\n\nDetener todos los temporizadores SHDLC y cancelar sm_work sincr\u00f3nicamente antes de purgar las colas y liberar el contexto.\n\nEncontrado por Linux Verification Center (linuxtesting.org) con SVACE."}], "lastModified": "2026-07-22T20:10:00.127", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "121A36DD-C173-453C-8437-6A634B06F4D3", "versionEndExcluding": "5.15.202", "versionStartIncluding": "3.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "797C7F46-D0BE-4FB8-A502-C5EF8E6B6654", "versionEndExcluding": "6.1.165", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "851E9353-6C09-4CC9-877E-E09DB164A3C2", "versionEndExcluding": "6.6.128", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BCE16369-98ED-41CF-8995-DFDC10B288D2", "versionEndExcluding": "6.12.75", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BF463CB7-1F58-4607-B847-77ED23E4B9B7", "versionEndExcluding": "6.18.14", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "672A3E79-EC03-479D-8503-361DFBDC8092", "versionEndExcluding": "6.19.4", "versionStartIncluding": "6.19"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}