CVE-2026-46047
net: qrtr: ns: Fix use-after-free in driver remove()
Description
In 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.
INFO
Published Date :
May 27, 2026, 2:17 p.m.
Last Modified :
June 1, 2026, 5:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Save sk_data_ready callback during initialization.
- Replace qrtr_ns_data_ready callback at start of remove.
- Ensure RX threads complete before destroying workqueue.
References to Advisories, Solutions, and Tools
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CVE-2026-46047.
CWE - Common Weakness Enumeration
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associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
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approaches employed by adversaries to exploit the CVE-2026-46047
weaknesses.
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CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 01, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/4ae0bd51bf7079e9c2a06b5de0ae04ba70d10167 Added Reference https://git.kernel.org/stable/c/65168712c216584ff482a7d1a67589f2079b2634 Added Reference https://git.kernel.org/stable/c/dff081c3602f2fd810f69ef47945a226980dd05d -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 27, 2026
Action Type Old Value New Value Added Description In 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. Added Reference https://git.kernel.org/stable/c/0f313eb6a8f6dffa491373cf3afab979fa1c02f4 Added Reference https://git.kernel.org/stable/c/2e127ceb1c415e246076d8e09e23e443a7a2038f Added Reference https://git.kernel.org/stable/c/7809fea20c9404bfcfa6112ec08d1fe1d3520beb Added Reference https://git.kernel.org/stable/c/db3c60ec772de30acae92d560dfcc5258e58dbe8 Added Reference https://git.kernel.org/stable/c/f96779e916576e81430ebb326baff6e433fef8ae