CVE-2026-46267 Details
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.
A use-after-free vulnerability has been identified in the Linux kernel's NFC SHDLC implementation. The issue arises in the 'llc_shdlc_deinit' function, which purges SHDLC socket buffers and frees the SHDLC structure. This process can interfere with active timers and the state machine, potentially leading to a use-after-free condition and other shutdown-related races. The vulnerability was discovered by the Linux Verification Center using the SVACE analysis tool.
The vulnerability has been addressed in the Linux kernel. Users should upgrade to the latest version where this issue has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/1cb97b1225450af3f7b728777929ba50c6a58ced | kernel.org | Patch |
| https://git.kernel.org/stable/c/276820278e9717cc7d4bb32381892dd3ddf418d4 | kernel.org | Patch |
| https://git.kernel.org/stable/c/77eef9f2eef045c3c37a3df82d3e661afb866b98 | kernel.org | Patch |
| https://git.kernel.org/stable/c/a24a676329d40481b2331bfa1418a679577dfd3a | kernel.org | Patch |
| https://git.kernel.org/stable/c/c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e | kernel.org | Patch |
| https://git.kernel.org/stable/c/c9efde1e537baed7648a94022b43836a348a074f | kernel.org | Patch |
| https://git.kernel.org/stable/c/cf70cedce327833296ebe6043364d1e44b76a2ab | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 3.7, < 5.15.202 >= 5.16, < 6.1.165 >= 6.2, < 6.6.128 >= 6.7, < 6.12.75 >= 6.13, < 6.18.14 >= 6.19, < 6.19.4 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 22, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 9, 2026 | Initial Analysis | [email protected] |
| Jun 3, 2026 | New CVE Received | kernel.org |