nfc: rawsock: cancel tx_work before socket teardown

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Summary

CVECVE-2026-23372
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-25 11:16:36 UTC
Updated2026-04-02 15:16:32 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: nfc: rawsock: cancel tx_work before socket teardown In rawsock_release(), cancel any pending tx_work and purge the write queue before orphaning the socket. rawsock_tx_work runs on the system workqueue and calls nfc_data_exchange which dereferences the NCI device. Without synchronization, tx_work can race with socket and device teardown when a process is killed (e.g. by SIGKILL), leading to use-after-free or leaked references. Set SEND_SHUTDOWN first so that if tx_work is already running it will see the flag and skip transmitting, then use cancel_work_sync to wait for any in-progress execution to finish, and finally purge any remaining queued skbs.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.000310000 probability, percentile 0.088530000 (date 2026-04-02)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 23b7869c0fd08d73c9f83a2db88a13312d6198bb 3ae592ed91bb4b6b51df256b51045c13d2656049 git Not specified
CNA Linux Linux affected 23b7869c0fd08d73c9f83a2db88a13312d6198bb 722a28b635ec281bb08a23885223526d8e7d6526 git Not specified
CNA Linux Linux affected 23b7869c0fd08d73c9f83a2db88a13312d6198bb 78141b8832e16d80d09cbefb4258612db0777a24 git Not specified
CNA Linux Linux affected 23b7869c0fd08d73c9f83a2db88a13312d6198bb edc988613def90c5b558e025b1b423f48007be06 git Not specified
CNA Linux Linux affected 23b7869c0fd08d73c9f83a2db88a13312d6198bb da4515fc8263c5933ed605e396af91079806dc45 git Not specified
CNA Linux Linux affected 23b7869c0fd08d73c9f83a2db88a13312d6198bb d793458c45df2aed498d7f74145eab7ee22d25aa git Not specified
CNA Linux Linux affected 3.1 Not specified
CNA Linux Linux unaffected 3.1 semver Not specified
CNA Linux Linux unaffected 6.1.167 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.130 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.77 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.17 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.7 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/da4515fc8263c5933ed605e396af91079806dc45 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d793458c45df2aed498d7f74145eab7ee22d25aa 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/78141b8832e16d80d09cbefb4258612db0777a24 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/722a28b635ec281bb08a23885223526d8e7d6526 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/edc988613def90c5b558e025b1b423f48007be06 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3ae592ed91bb4b6b51df256b51045c13d2656049 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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