CVE-2026-46267
nfc: hci: shdlc: Stop timers and work before freeing context
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
3.7
References 7
git.kernel.org
- stable/c/c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e
- stable/c/a24a676329d40481b2331bfa1418a679577dfd3a
- stable/c/77eef9f2eef045c3c37a3df82d3e661afb866b98
- stable/c/cf70cedce327833296ebe6043364d1e44b76a2ab
- stable/c/276820278e9717cc7d4bb32381892dd3ddf418d4
- stable/c/1cb97b1225450af3f7b728777929ba50c6a58ced
- stable/c/c9efde1e537baed7648a94022b43836a348a074f