net: qrtr: ns: Fix use-after-free in driver remove()

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Summary

CVECVE-2026-46047
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-27 14:17:24 UTC
Updated2026-05-27 14:48:03 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: net: qrtr: ns: Fix use-after-free in driver remove() In the remove callback, if a packet arrives after destroy_workqueue() is called, but before sock_release(), the qrtr_ns_data_ready() callback will try to queue the work, causing use-after-free issue. Fix this issue by saving the default 'sk_data_ready' callback during qrtr_ns_init() and use it to replace the qrtr_ns_data_ready() callback at the start of remove(). This ensures that even if a packet arrives after destroy_workqueue(), the work struct will not be dereferenced. Note that it is also required to ensure that the RX threads are completed before destroying the workqueue, because the threads could be using the qrtr_ns_data_ready() callback.

Risk And Classification

EPSS: 0.000180000 probability, percentile 0.051570000 (date 2026-05-30)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 0c2204a4ad710d95d348ea006f14ba926e842ffd 0f313eb6a8f6dffa491373cf3afab979fa1c02f4 git Not specified
CNA Linux Linux affected 0c2204a4ad710d95d348ea006f14ba926e842ffd db3c60ec772de30acae92d560dfcc5258e58dbe8 git Not specified
CNA Linux Linux affected 0c2204a4ad710d95d348ea006f14ba926e842ffd 2e127ceb1c415e246076d8e09e23e443a7a2038f git Not specified
CNA Linux Linux affected 0c2204a4ad710d95d348ea006f14ba926e842ffd f96779e916576e81430ebb326baff6e433fef8ae git Not specified
CNA Linux Linux affected 0c2204a4ad710d95d348ea006f14ba926e842ffd 7809fea20c9404bfcfa6112ec08d1fe1d3520beb git Not specified
CNA Linux Linux affected 5.7 Not specified
CNA Linux Linux unaffected 5.7 semver Not specified
CNA Linux Linux unaffected 6.6.140 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.86 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.27 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.4 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/db3c60ec772de30acae92d560dfcc5258e58dbe8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0f313eb6a8f6dffa491373cf3afab979fa1c02f4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2e127ceb1c415e246076d8e09e23e443a7a2038f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7809fea20c9404bfcfa6112ec08d1fe1d3520beb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f96779e916576e81430ebb326baff6e433fef8ae 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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