CVE-2026-23372
Vulnerability Description
In 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.
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.
Vulnerability Details
Published Date
Last Modified
Source
NVD
Vendor
Linux
Product
Linux
External References
- https://git.kernel.org/stable/c/3ae592ed91bb4b6b51df256b51045c13d2656049
- https://git.kernel.org/stable/c/722a28b635ec281bb08a23885223526d8e7d6526
- https://git.kernel.org/stable/c/78141b8832e16d80d09cbefb4258612db0777a24
- https://git.kernel.org/stable/c/d793458c45df2aed498d7f74145eab7ee22d25aa
- https://git.kernel.org/stable/c/da4515fc8263c5933ed605e396af91079806dc45
- https://git.kernel.org/stable/c/edc988613def90c5b558e025b1b423f48007be06
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