wifi: mt76: add wcid publish check in mt76_sta_add

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: add wcid publish check in mt76_sta_add Since mt7925_mac_sta_add publishes wcid, add publish check in mt76_sta_add to avoid reinitializing the wcid->poll_list. Found dev->sta_poll_list corruption when using mt7925 and 7.1-rc4. According to the corruption information, prev->next was changed to itself. wlan0: disconnect from AP 90:fb:5d:94:8b:e3 for new auth to 90:fb:5d:94:8b:e2 wlan0: authenticate with 90:fb:5d:94:8b:e2 (local address=84:9e:56:9c:7e:6b) wlan0: send auth to 90:fb:5d:94:8b:e2 (try 1/3) slab kmalloc-8k start ffff8c80958a6000 pointer offset 4160 size 8192 list_add corruption. prev->next should be next (ffff8c808a7488f8), but was ffff8c80958a7040. (prev=ffff8c80958a7040). mt76_wcid_add_poll+0x95/0xd0 [mt76] mt7925_mac_add_txs.part.0+0xa5/0xe0 [mt7925_common] mt7925_rx_check+0xa7/0xc0 [mt7925_common] mt76_dma_rx_poll+0x50d/0x790 [mt76] mt792x_poll_rx+0x52/0xe0 [mt792x_lib]

Timeline

1. Jul 19, 2026, 12:02 PM UTCCVE published
2. Oct 16, 2026, 3:31 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: total

3. Oct 21, 2026, 12:42 PM UTCRecord last updated

Affected versions

• Linux Linux

  From c9389e3f9453ec2d710e61830eafedddfd561226 · fixed in 720f39a9c60fdb604291c630f4f157753b376d68; From 4911e4cb157cf87d5bdb3fa8e0c200032443371e · fixed in 3c499851753a24d2e148d4e9ca51764c0c51554e; From 4911e4cb157cf87d5bdb3fa8e0c200032443371e · fixed in 55e014aaec650ede08b693ba59c8d0443f13f11c; From 4911e4cb157cf87d5bdb3fa8e0c200032443371e · fixed in 20b126920a259df4d7dcae19fcfe2c57a74d6b2e; From 6.12.13 · fixed in 6.12.114; From 6.13.2 · fixed in 6.14

• Linux Linux

  6.14

• KernelLinux

  fixed in 6.12.114; From 6.13.0 · fixed in 6.18.38; From 6.14.0 · fixed in 7.1.3

References 4