Description
In the Linux kernel, the following vulnerability has been resolved: wifi: ath10k: add peer map clean up for peer delete in ath10k_sta_state() When peer delete failed in a disconnect operation, use-after-free detected by KFENCE in below log. It is because for each vdev_id and address, it has only one struct ath10k_peer, it is allocated in ath10k_peer_map_event(). When connected to an AP, it has more than one HTT_T2H_MSG_TYPE_PEER_MAP reported from firmware, then the array peer_map of struct ath10k will be set muti-elements to the same ath10k_peer in ath10k_peer_map_event(). When peer delete failed in ath10k_sta_state(), the ath10k_peer will be free for the 1st peer id in array peer_map of struct ath10k, and then use-after-free happened for the 2nd peer id because they map to the same ath10k_peer. And clean up all peers in array peer_map for the ath10k_peer, then user-after-free disappeared peer map event log: [ 306.911021] wlan0: authenticate with b0:2a:43:e6:75:0e [ 306.957187] ath10k_pci 0000:01:00.0: mac vdev 0 peer create b0:2a:43:e6:75:0e (new sta) sta 1 / 32 peer 1 / 33 [ 306.957395] ath10k_pci 0000:01:00.0: htt peer map vdev 0 peer b0:2a:43:e6:75:0e id 246 [ 306.957404] ath10k_pci 0000:01:00.0: htt peer map vdev 0 peer b0:2a:43:e6:75:0e id 198 [ 306.986924] ath10k_pci 0000:01:00.0: htt peer map vdev 0 peer b0:2a:43:e6:75:0e id 166 peer unmap event log: [ 435.715691] wlan0: deauthenticating from b0:2a:43:e6:75:0e by local choice (Reason: 3=DEAUTH_LEAVING) [ 435.716802] ath10k_pci 0000:01:00.0: mac vdev 0 peer delete b0:2a:43:e6:75:0e sta ffff990e0e9c2b50 (sta gone) [ 435.717177] ath10k_pci 0000:01:00.0: htt peer unmap vdev 0 peer b0:2a:43:e6:75:0e id 246 [ 435.717186] ath10k_pci 0000:01:00.0: htt peer unmap vdev 0 peer b0:2a:43:e6:75:0e id 198 [ 435.717193] ath10k_pci 0000:01:00.0: htt peer unmap vdev 0 peer b0:2a:43:e6:75:0e id 166 use-after-free log: [21705.888627] wlan0: deauthenticating from d0:76:8f:82:be:75 by local choice (Reason: 3=DEAUTH_LEAVING) [21713.799910] ath10k_pci 0000:01:00.0: failed to delete peer d0:76:8f:82:be:75 for vdev 0: -110 [21713.799925] ath10k_pci 0000:01:00.0: found sta peer d0:76:8f:82:be:75 (ptr 0000000000000000 id 102) entry on vdev 0 after it was supposedly removed [21713.799968] ================================================================== [21713.799991] BUG: KFENCE: use-after-free read in ath10k_sta_state+0x265/0xb8a [ath10k_core] [21713.799991] [21713.799997] Use-after-free read at 0x00000000abe1c75e (in kfence-#69): [21713.800010] ath10k_sta_state+0x265/0xb8a [ath10k_core] [21713.800041] drv_sta_state+0x115/0x677 [mac80211] [21713.800059] __sta_info_destroy_part2+0xb1/0x133 [mac80211] [21713.800076] __sta_info_flush+0x11d/0x162 [mac80211] [21713.800093] ieee80211_set_disassoc+0x12d/0x2f4 [mac80211] [21713.800110] ieee80211_mgd_deauth+0x26c/0x29b [mac80211] [21713.800137] cfg80211_mlme_deauth+0x13f/0x1bb [cfg80211] [21713.800153] nl80211_deauthenticate+0xf8/0x121 [cfg80211] [21713.800161] genl_rcv_msg+0x38e/0x3be [21713.800166] netlink_rcv_skb+0x89/0xf7 [21713.800171] genl_rcv+0x28/0x36 [21713.800176] netlink_unicast+0x179/0x24b [21713.800181] netlink_sendmsg+0x3a0/0x40e [21713.800187] sock_sendmsg+0x72/0x76 [21713.800192] ____sys_sendmsg+0x16d/0x1e3 [21713.800196] ___sys_sendmsg+0x95/0xd1 [21713.800200] __sys_sendmsg+0x85/0xbf [21713.800205] do_syscall_64+0x43/0x55 [21713.800210] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [21713.800213] [21713.800219] kfence-#69: 0x000000009149b0d5-0x000000004c0697fb, size=1064, cache=kmalloc-2k [21713.800219] [21713.800224] allocated by task 13 on cpu 0 at 21705.501373s: [21713.800241] ath10k_peer_map_event+0x7e/0x154 [ath10k_core] [21713.800254] ath10k_htt_t2h_msg_handler+0x586/0x1039 [ath10k_core] [21713.800265] ath10k_htt_htc_t2h_msg_handler+0x12/0x28 [ath10k_core] [21713.800277] ath10k_htc_rx_completion_handler+0x14c/0x1b5 [ath10k_core] [21713.800283] ath10k_pci_process_rx_cb+0x195/0x1d ---truncated---
Product status
d0eeafad118940fe445ca00f45be5624fea2ec34 (git) before 15604ab67179ae27ea3c7fb24b6df32b143257c4
d0eeafad118940fe445ca00f45be5624fea2ec34 (git) before 2d6259715c9597a6cfa25db8911683eb0073b1c6
d0eeafad118940fe445ca00f45be5624fea2ec34 (git) before f12fc305c127bd07bb50373e29c6037696f916a8
d0eeafad118940fe445ca00f45be5624fea2ec34 (git) before 4494ec1c0bb850eaa80fed98e5b041d961011d3e
d0eeafad118940fe445ca00f45be5624fea2ec34 (git) before 08faf07717be0c88b02b5aa45aad2225dfcdd2dc
d0eeafad118940fe445ca00f45be5624fea2ec34 (git) before 54a3201f3c1ff813523937da78b5fa7649dbab71
d0eeafad118940fe445ca00f45be5624fea2ec34 (git) before 2bf916418d2141b810c40812433ab4ecfd3c2934
d0eeafad118940fe445ca00f45be5624fea2ec34 (git) before 38245f2d62cd4d1f38a763a7b4045ab4565b30a0
d0eeafad118940fe445ca00f45be5624fea2ec34 (git) before f020d9570a04df0762a2ac5c50cf1d8c511c9164
4.8
Any version before 4.8
4.9.331 (semver)
4.14.296 (semver)
4.19.262 (semver)
5.4.220 (semver)
5.10.150 (semver)
5.15.75 (semver)
5.19.17 (semver)
6.0.3 (semver)
6.1 (original_commit_for_fix)
References
git.kernel.org/...c/15604ab67179ae27ea3c7fb24b6df32b143257c4
git.kernel.org/...c/2d6259715c9597a6cfa25db8911683eb0073b1c6
git.kernel.org/...c/f12fc305c127bd07bb50373e29c6037696f916a8
git.kernel.org/...c/4494ec1c0bb850eaa80fed98e5b041d961011d3e
git.kernel.org/...c/08faf07717be0c88b02b5aa45aad2225dfcdd2dc
git.kernel.org/...c/54a3201f3c1ff813523937da78b5fa7649dbab71
git.kernel.org/...c/2bf916418d2141b810c40812433ab4ecfd3c2934
git.kernel.org/...c/38245f2d62cd4d1f38a763a7b4045ab4565b30a0
git.kernel.org/...c/f020d9570a04df0762a2ac5c50cf1d8c511c9164
Data based on CVE®. Copyright © 1999-2025, The MITRE Corporation. All rights reserved.
