CVE-2026-46267nfc: hci: shdlc: Stop timers and work before freeing context
- 7.8HighCVSS base score
- 0.12%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 21 days later
· 21 days later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.12% · top 98% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 4a61cd6687fc6348d08724676d34e38160d6cf9b – < c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e
- affected 4a61cd6687fc6348d08724676d34e38160d6cf9b – < a24a676329d40481b2331bfa1418a679577dfd3a
- affected 4a61cd6687fc6348d08724676d34e38160d6cf9b – < 77eef9f2eef045c3c37a3df82d3e661afb866b98
- affected 4a61cd6687fc6348d08724676d34e38160d6cf9b – < cf70cedce327833296ebe6043364d1e44b76a2ab
- affected 4a61cd6687fc6348d08724676d34e38160d6cf9b – < 276820278e9717cc7d4bb32381892dd3ddf418d4
- affected 4a61cd6687fc6348d08724676d34e38160d6cf9b – < 1cb97b1225450af3f7b728777929ba50c6a58ced
- affected 4a61cd6687fc6348d08724676d34e38160d6cf9b – < c9efde1e537baed7648a94022b43836a348a074f
- affected 3.7
- unaffected < 3.7
- unaffected 5.15.202 – ≤ 5.15.*
- unaffected 6.1.165 – ≤ 6.1.*
- unaffected 6.6.128 – ≤ 6.6.*
- unaffected 6.12.75 – ≤ 6.12.*
- unaffected 6.18.14 – ≤ 6.18.*
- unaffected 6.19.4 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References7
- https://git.kernel.org/stable/c/c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e (opens in a new tab)
- https://git.kernel.org/stable/c/a24a676329d40481b2331bfa1418a679577dfd3a (opens in a new tab)
- https://git.kernel.org/stable/c/77eef9f2eef045c3c37a3df82d3e661afb866b98 (opens in a new tab)
- https://git.kernel.org/stable/c/cf70cedce327833296ebe6043364d1e44b76a2ab (opens in a new tab)
- https://git.kernel.org/stable/c/276820278e9717cc7d4bb32381892dd3ddf418d4 (opens in a new tab)
- https://git.kernel.org/stable/c/1cb97b1225450af3f7b728777929ba50c6a58ced (opens in a new tab)
- https://git.kernel.org/stable/c/c9efde1e537baed7648a94022b43836a348a074f (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-34129 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-46267)Record last updated .