nfc: rawsock: cancel tx_work before socket teardown

Summary

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.

Timeline

1. Mar 25, 2026, 10:27 AM UTCCVE published
2. Oct 15, 2026, 1:14 AM UTCRecord last updated

Affected versions

• Linux Linux

  From 23b7869c0fd08d73c9f83a2db88a13312d6198bb · fixed in 9b2d23cd09e1cb56bdf0e4d5614703094159f16c; From 23b7869c0fd08d73c9f83a2db88a13312d6198bb · fixed in cdeed45ce8c92defd057f7d67ee9a69374d8fa16; From 23b7869c0fd08d73c9f83a2db88a13312d6198bb · fixed in 3ae592ed91bb4b6b51df256b51045c13d2656049; From 23b7869c0fd08d73c9f83a2db88a13312d6198bb · fixed in 722a28b635ec281bb08a23885223526d8e7d6526; From 23b7869c0fd08d73c9f83a2db88a13312d6198bb · fixed in 78141b8832e16d80d09cbefb4258612db0777a24; From 23b7869c0fd08d73c9f83a2db88a13312d6198bb · fixed in edc988613def90c5b558e025b1b423f48007be06; From 23b7869c0fd08d73c9f83a2db88a13312d6198bb · fixed in da4515fc8263c5933ed605e396af91079806dc45; From 23b7869c0fd08d73c9f83a2db88a13312d6198bb · fixed in d793458c45df2aed498d7f74145eab7ee22d25aa

• Linux Linux

  3.1

• KernelLinux

  From 3.1.0 · fixed in 5.10.253; From 5.11.0 · fixed in 5.15.203; From 5.16.0 · fixed in 6.1.167; From 6.2.0 · fixed in 6.6.130; From 6.7.0 · fixed in 6.12.77; From 6.13.0 · fixed in 6.18.17; From 6.19.0 · fixed in 6.19.7

References 8