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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.12%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.12% probability · 2th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.