Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.7, < 5.15.202 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/1cb97b1225450af3f7b728777929ba50c6a58cedPatch
- https://git.kernel.org/stable/c/276820278e9717cc7d4bb32381892dd3ddf418d4Patch
- https://git.kernel.org/stable/c/77eef9f2eef045c3c37a3df82d3e661afb866b98Patch
- https://git.kernel.org/stable/c/a24a676329d40481b2331bfa1418a679577dfd3aPatch
- https://git.kernel.org/stable/c/c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6ePatch
- https://git.kernel.org/stable/c/c9efde1e537baed7648a94022b43836a348a074fPatch
- https://git.kernel.org/stable/c/cf70cedce327833296ebe6043364d1e44b76a2abPatch
FAQ
What is CVE-2026-46267?
CVE-2026-46267 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 st...
How severe is CVE-2026-46267?
CVE-2026-46267 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-46267?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.