wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete A use-after-free issue occurs in mt76_rx_poll_complete due to a race condition. The STA has already been removed, but the rx_status still had a pointer to the wcid in the STA. Set the links' wcid pointers to be NULL for a MLD in mt7925_sta_pre_rcu_remove() BUG: KASAN: invalid-access in mt76_rx_poll_complete+0x280/0x470 Call trace: dump_backtrace+0xec/0x128 show_stack+0x18/0x28 dump_stack_lvl+0x40/0xc8 print_report+0x1b8/0x710 kasan_report+0xe0/0x144 do_bad_area+0x120/0x260 do_tag_check_fault+0x20/0x34 do_mem_abort+0x54/0xa8 el1_abort+0x3c/0x5c el1h_64_sync_handler+0x40/0xcc el1h_64_sync+0x7c/0x80 mt76_rx_poll_complete+0x280/0x470 mt76_dma_rx_poll+0x114/0x51c mt792x_poll_rx+0x60/0xf8 napi_threaded_poll_loop+0xe0/0x450 napi_threaded_poll+0x80/0x9c kthread+0x11c/0x158 ret_from_fork+0x10/0x20

Timeline

1. Sep 17, 2026, 4:09 PM UTCCVE published
2. Oct 19, 2026, 9:02 AM UTCRecord last updated

Affected versions

• Linux Linux

  From c948b5da6bbec742b433138e3e3f9537a85af2e5 · fixed in aaf414bf81ab4b680580871784b0b929818188eb; From c948b5da6bbec742b433138e3e3f9537a85af2e5 · fixed in 2aa3d3b9fac9163e9226e35556607ae3f75be21e; From c948b5da6bbec742b433138e3e3f9537a85af2e5 · fixed in b250943f3f8351385a17972bda001664a5c51008; From c948b5da6bbec742b433138e3e3f9537a85af2e5 · fixed in 217f9e7bb02558759be9d9ecfe532e9708741c50

• Linux Linux

  6.7

• KernelLinux

  From 6.7.0 · fixed in 6.12.110; From 6.13.0 · fixed in 6.18.57; From 6.19.0 · fixed in 7.2.6

References 4