---
id: CVE-2022-50880
title: 'wifi: ath10k: add peer map clean up for peer delete in ath10k_sta_state()'
summary: |-
  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…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= d0eeafad118940fe445ca00f45be5624fea2ec34 <
    15604ab67179ae27ea3c7fb24b6df32b143257c4
  - >-
    Linux >= d0eeafad118940fe445ca00f45be5624fea2ec34 <
    2d6259715c9597a6cfa25db8911683eb0073b1c6
  - >-
    Linux >= d0eeafad118940fe445ca00f45be5624fea2ec34 <
    f12fc305c127bd07bb50373e29c6037696f916a8
  - >-
    Linux >= d0eeafad118940fe445ca00f45be5624fea2ec34 <
    4494ec1c0bb850eaa80fed98e5b041d961011d3e
  - >-
    Linux >= d0eeafad118940fe445ca00f45be5624fea2ec34 <
    08faf07717be0c88b02b5aa45aad2225dfcdd2dc
  - >-
    Linux >= d0eeafad118940fe445ca00f45be5624fea2ec34 <
    54a3201f3c1ff813523937da78b5fa7649dbab71
  - >-
    Linux >= d0eeafad118940fe445ca00f45be5624fea2ec34 <
    2bf916418d2141b810c40812433ab4ecfd3c2934
  - >-
    Linux >= d0eeafad118940fe445ca00f45be5624fea2ec34 <
    38245f2d62cd4d1f38a763a7b4045ab4565b30a0
  - >-
    Linux >= d0eeafad118940fe445ca00f45be5624fea2ec34 <
    f020d9570a04df0762a2ac5c50cf1d8c511c9164
  - Linux 4.8
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-15T21:32:44.424590Z'
published: '2025-12-30'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T21:41:24.432Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2022-50880'
references:
  - url: 'https://git.kernel.org/stable/c/15604ab67179ae27ea3c7fb24b6df32b143257c4'
  - url: 'https://git.kernel.org/stable/c/2d6259715c9597a6cfa25db8911683eb0073b1c6'
  - url: 'https://git.kernel.org/stable/c/f12fc305c127bd07bb50373e29c6037696f916a8'
  - url: 'https://git.kernel.org/stable/c/4494ec1c0bb850eaa80fed98e5b041d961011d3e'
  - url: 'https://git.kernel.org/stable/c/08faf07717be0c88b02b5aa45aad2225dfcdd2dc'
  - url: 'https://git.kernel.org/stable/c/54a3201f3c1ff813523937da78b5fa7649dbab71'
  - url: 'https://git.kernel.org/stable/c/2bf916418d2141b810c40812433ab4ecfd3c2934'
  - url: 'https://git.kernel.org/stable/c/38245f2d62cd4d1f38a763a7b4045ab4565b30a0'
  - url: 'https://git.kernel.org/stable/c/f020d9570a04df0762a2ac5c50cf1d8c511c9164'
tags:
  - cve.org
epss: 0.00321
epssPercentile: 0.23426
ingestedAt: '2026-10-15T22:48:25.384Z'
---

## Overview

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---

## Affected

- `Linux >= d0eeafad118940fe445ca00f45be5624fea2ec34 < 15604ab67179ae27ea3c7fb24b6df32b143257c4`
- `Linux >= d0eeafad118940fe445ca00f45be5624fea2ec34 < 2d6259715c9597a6cfa25db8911683eb0073b1c6`
- `Linux >= d0eeafad118940fe445ca00f45be5624fea2ec34 < f12fc305c127bd07bb50373e29c6037696f916a8`
- `Linux >= d0eeafad118940fe445ca00f45be5624fea2ec34 < 4494ec1c0bb850eaa80fed98e5b041d961011d3e`
- `Linux >= d0eeafad118940fe445ca00f45be5624fea2ec34 < 08faf07717be0c88b02b5aa45aad2225dfcdd2dc`
- `Linux >= d0eeafad118940fe445ca00f45be5624fea2ec34 < 54a3201f3c1ff813523937da78b5fa7649dbab71`
- `Linux >= d0eeafad118940fe445ca00f45be5624fea2ec34 < 2bf916418d2141b810c40812433ab4ecfd3c2934`
- `Linux >= d0eeafad118940fe445ca00f45be5624fea2ec34 < 38245f2d62cd4d1f38a763a7b4045ab4565b30a0`
- `Linux >= d0eeafad118940fe445ca00f45be5624fea2ec34 < f020d9570a04df0762a2ac5c50cf1d8c511c9164`
- `Linux 4.8`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.