CVE-2026-46267

Kernel memory corruption via SHDLC teardown race

Published Jun 3, 2026 · Updated Jun 3, 2026

Use-after-free in the Linux Kernel NFC SHDLC layer allows local users to corrupt kernel memory by racing interface teardown. llc_shdlc_deinit() frees the SHDLC context and purges its packet queues without first stopping timers or synchronously canceling sm_work, which can later access the released state. Low-privileged local access and concurrent teardown are required; successful exploitation can expose or alter kernel data or crash the system.

CVSS severity7.8
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux Kernel NFC SHDLC layer allows local users to corrupt kernel memory by racing interface teardown. llc_shdlc_deinit() frees the SHDLC context and purges its packet queues without first stopping timers or synchronously canceling sm_work, which can later access the released state. Low-privileged local access and concurrent teardown are required; successful exploitation can expose or alter kernel data or crash the system.

The record

CVE
CVE-2026-46267
Published
Jun 3, 2026
Updated
Jun 3, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.7
  2. Affected versionversion=4a61cd6687fc6348d08724676d34e38160d6cf9b <1cb97b1225450af3f7b728777929ba50c6a58ced
  3. Affected versionversion=4a61cd6687fc6348d08724676d34e38160d6cf9b <276820278e9717cc7d4bb32381892dd3ddf418d4
  4. Affected versionversion=4a61cd6687fc6348d08724676d34e38160d6cf9b <77eef9f2eef045c3c37a3df82d3e661afb866b98
  5. Affected versionversion=4a61cd6687fc6348d08724676d34e38160d6cf9b <a24a676329d40481b2331bfa1418a679577dfd3a
  6. Affected versionversion=4a61cd6687fc6348d08724676d34e38160d6cf9b <c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e
  7. Affected versionversion=4a61cd6687fc6348d08724676d34e38160d6cf9b <c9efde1e537baed7648a94022b43836a348a074f
  8. Affected versionversion=4a61cd6687fc6348d08724676d34e38160d6cf9b <cf70cedce327833296ebe6043364d1e44b76a2ab

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.7; version=4a61cd6687fc6348d08724676d34e38160d6cf9b <1cb97b1225450af3f7b728777929ba50c6a58ced; version=4a61cd6687fc6348d08724676d34e38160d6cf9b <276820278e9717cc7d4bb32381892dd3ddf418d4; version=4a61cd6687fc6348d08724676d34e38160d6cf9b <77eef9f2eef045c3c37a3df82d3e661afb866b98; version=4a61cd6687fc6348d08724676d34e38160d6cf9b <a24a676329d40481b2331bfa1418a679577dfd3a; version=4a61cd6687fc6348d08724676d34e38160d6cf9b <c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e; version=4a61cd6687fc6348d08724676d34e38160d6cf9b <c9efde1e537baed7648a94022b43836a348a074f; version=4a61cd6687fc6348d08724676d34e38160d6cf9b <cf70cedce327833296ebe6043364d1e44b76a2ab

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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