{"id":"CVE-2022-49328","summary":"mt76: fix use-after-free by removing a non-RCU wcid pointer","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmt76: fix use-after-free by removing a non-RCU wcid pointer\n\nFixes an issue caught by KASAN about use-after-free in mt76_txq_schedule\nby protecting mtxq-\u003ewcid with rcu_lock between mt76_txq_schedule and\nsta_info_[alloc, free].\n\n[18853.876689] ==================================================================\n[18853.876751] BUG: KASAN: use-after-free in mt76_txq_schedule+0x204/0xaf8 [mt76]\n[18853.876773] Read of size 8 at addr ffffffaf989a2138 by task mt76-tx phy0/883\n[18853.876786]\n[18853.876810] CPU: 5 PID: 883 Comm: mt76-tx phy0 Not tainted 5.10.100-fix-510-56778d365941-kasan #5 0b01fbbcf41a530f52043508fec2e31a4215\n\n[18853.876840] Call trace:\n[18853.876861]  dump_backtrace+0x0/0x3ec\n[18853.876878]  show_stack+0x20/0x2c\n[18853.876899]  dump_stack+0x11c/0x1ac\n[18853.876918]  print_address_description+0x74/0x514\n[18853.876934]  kasan_report+0x134/0x174\n[18853.876948]  __asan_report_load8_noabort+0x44/0x50\n[18853.876976]  mt76_txq_schedule+0x204/0xaf8 [mt76 074e03e4640e97fe7405ee1fab547b81c4fa45d2]\n[18853.877002]  mt76_txq_schedule_all+0x2c/0x48 [mt76 074e03e4640e97fe7405ee1fab547b81c4fa45d2]\n[18853.877030]  mt7921_tx_worker+0xa0/0x1cc [mt7921_common f0875ebac9d7b4754e1010549e7db50fbd90a047]\n[18853.877054]  __mt76_worker_fn+0x190/0x22c [mt76 074e03e4640e97fe7405ee1fab547b81c4fa45d2]\n[18853.877071]  kthread+0x2f8/0x3b8\n[18853.877087]  ret_from_fork+0x10/0x30\n[18853.877098]\n[18853.877112] Allocated by task 941:\n[18853.877131]  kasan_save_stack+0x38/0x68\n[18853.877147]  __kasan_kmalloc+0xd4/0xfc\n[18853.877163]  kasan_kmalloc+0x10/0x1c\n[18853.877177]  __kmalloc+0x264/0x3c4\n[18853.877294]  sta_info_alloc+0x460/0xf88 [mac80211]\n[18853.877410]  ieee80211_prep_connection+0x204/0x1ee0 [mac80211]\n[18853.877523]  ieee80211_mgd_auth+0x6c4/0xa4c [mac80211]\n[18853.877635]  ieee80211_auth+0x20/0x2c [mac80211]\n[18853.877733]  rdev_auth+0x7c/0x438 [cfg80211]\n[18853.877826]  cfg80211_mlme_auth+0x26c/0x390 [cfg80211]\n[18853.877919]  nl80211_authenticate+0x6d4/0x904 [cfg80211]\n[18853.877938]  genl_rcv_msg+0x748/0x93c\n[18853.877954]  netlink_rcv_skb+0x160/0x2a8\n[18853.877969]  genl_rcv+0x3c/0x54\n[18853.877985]  netlink_unicast_kernel+0x104/0x1ec\n[18853.877999]  netlink_unicast+0x178/0x268\n[18853.878015]  netlink_sendmsg+0x3cc/0x5f0\n[18853.878030]  sock_sendmsg+0xb4/0xd8\n[18853.878043]  ____sys_sendmsg+0x2f8/0x53c\n[18853.878058]  ___sys_sendmsg+0xe8/0x150\n[18853.878071]  __sys_sendmsg+0xc4/0x1f4\n[18853.878087]  __arm64_compat_sys_sendmsg+0x88/0x9c\n[18853.878101]  el0_svc_common+0x1b4/0x390\n[18853.878115]  do_el0_svc_compat+0x8c/0xdc\n[18853.878131]  el0_svc_compat+0x10/0x1c\n[18853.878146]  el0_sync_compat_handler+0xa8/0xcc\n[18853.878161]  el0_sync_compat+0x188/0x1c0\n[18853.878171]\n[18853.878183] Freed by task 10927:\n[18853.878200]  kasan_save_stack+0x38/0x68\n[18853.878215]  kasan_set_track+0x28/0x3c\n[18853.878228]  kasan_set_free_info+0x24/0x48\n[18853.878244]  __kasan_slab_free+0x11c/0x154\n[18853.878259]  kasan_slab_free+0x14/0x24\n[18853.878273]  slab_free_freelist_hook+0xac/0x1b0\n[18853.878287]  kfree+0x104/0x390\n[18853.878402]  sta_info_free+0x198/0x210 [mac80211]\n[18853.878515]  __sta_info_destroy_part2+0x230/0x2d4 [mac80211]\n[18853.878628]  __sta_info_flush+0x300/0x37c [mac80211]\n[18853.878740]  ieee80211_set_disassoc+0x2cc/0xa7c [mac80211]\n[18853.878851]  ieee80211_mgd_deauth+0x4a4/0x10a0 [mac80211]\n[18853.878962]  ieee80211_deauth+0x20/0x2c [mac80211]\n[18853.879057]  rdev_deauth+0x7c/0x438 [cfg80211]\n[18853.879150]  cfg80211_mlme_deauth+0x274/0x414 [cfg80211]\n[18853.879243]  cfg80211_mlme_down+0xe4/0x118 [cfg80211]\n[18853.879335]  cfg80211_disconnect+0x218/0x2d8 [cfg80211]\n[18853.879427]  __cfg80211_leave+0x17c/0x240 [cfg80211]\n[18853.879519]  cfg80211_leave+0x3c/0x58 [cfg80211]\n[18853.879611]  wiphy_suspend+0xdc/0x200 [cfg80211]\n[18853.879628]  dpm_run_callback+0x58/0x408\n[18853.879642]  __device_suspend+0x4cc/0x864\n[18853.879658]  async_suspend+0x34/0xf4\n[18\n---truncated---","modified":"2026-04-02T08:27:29.280403Z","published":"2025-02-26T02:10:49.590Z","related":["SUSE-SU-2025:1027-1","SUSE-SU-2025:1176-1","SUSE-SU-2025:1183-1","SUSE-SU-2025:1241-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49328.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/4448327b41738dbfcda680eb4935ff835568f468"},{"type":"WEB","url":"https://git.kernel.org/stable/c/51fb1278aa57ae0fc54adaa786e1965362bed4fb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d5f77f1dbb59feae81f88e44551e8e1d8a802d9a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e55bcdd0bf34a8b10d45ce80ebb3164c5292a17d"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49328.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49328"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7bc04215a66b60e198aecaee8418f6d79fa19faa"},{"fixed":"4448327b41738dbfcda680eb4935ff835568f468"},{"fixed":"e55bcdd0bf34a8b10d45ce80ebb3164c5292a17d"},{"fixed":"d5f77f1dbb59feae81f88e44551e8e1d8a802d9a"},{"fixed":"51fb1278aa57ae0fc54adaa786e1965362bed4fb"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49328.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}