Vulnerability Report

CVE-2026-46267

Title: Linux kernel nfc/hci/shdlc Use-After-Free

Memory Corruption

Proof Of Concept

No public PoC currently indexed for CVE-2026-46267.

CWE Category NVD-CWE-noinfo

Published Date Jun 03, 2026

Modified Date Jun 09, 2026

Exploit Status Not Found

Score 7.8 CVSS v

Exploit Probability (EPSS)

0.12%

Vulnerability Summary

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.

Impacted Vendors

linux 1

ubuntu 1

Reference Links

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

CVSS v3.1

Source Entity [email protected]

Severity HIGH

7.8

Attack Vector

LOCAL

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-46267 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

June 09, 2026 MODIFIED

Vulnerability data updated via NVD.

June 05, 2026 MODIFIED

Vulnerability data updated via NVD.

June 03, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector LOCAL

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


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

Affected Stack

No specific products linked.