CVE-2026-46267 (GCVE-0-2026-46267)

Vulnerability from cvelistv5 – Published: 2026-06-03 15:50 – Updated: 2026-06-03 15:50
VLAI
Title
nfc: hci: shdlc: Stop timers and work before freeing context
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 4a61cd6687fc6348d08724676d34e38160d6cf9b , < c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e (git)
Affected: 4a61cd6687fc6348d08724676d34e38160d6cf9b , < a24a676329d40481b2331bfa1418a679577dfd3a (git)
Affected: 4a61cd6687fc6348d08724676d34e38160d6cf9b , < 77eef9f2eef045c3c37a3df82d3e661afb866b98 (git)
Affected: 4a61cd6687fc6348d08724676d34e38160d6cf9b , < cf70cedce327833296ebe6043364d1e44b76a2ab (git)
Affected: 4a61cd6687fc6348d08724676d34e38160d6cf9b , < 276820278e9717cc7d4bb32381892dd3ddf418d4 (git)
Affected: 4a61cd6687fc6348d08724676d34e38160d6cf9b , < 1cb97b1225450af3f7b728777929ba50c6a58ced (git)
Affected: 4a61cd6687fc6348d08724676d34e38160d6cf9b , < c9efde1e537baed7648a94022b43836a348a074f (git)
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Linux Linux Affected: 3.7
Unaffected: 0 , < 3.7 (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.14 , ≤ 6.18.* (semver)
Unaffected: 6.19.4 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.