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CVE-2022-49328— mt76: fix use-after-free by removing a non-RCU wcid pointer

Quick assessment

Affected

Linux Linux

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于mt76在移除非RCU wcid指针时发生释放后重用。

CVSS 8.8 · High EPSS 0.42% · P35 Updated Aug 15, 2026

Possible ATT&CK Techniques 2 AI

T1203 · Exploitation for Client Execution T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 10

Vendor	Product	Version Range	Status
Linux	Linux	`90fdc1717b1862eb3d506733f3b3e5217bc0de20< 4448327b41738dbfcda680eb4935ff835568f468`	affected
		`90fdc1717b1862eb3d506733f3b3e5217bc0de20< e55bcdd0bf34a8b10d45ce80ebb3164c5292a17d`	affected
		`90fdc1717b1862eb3d506733f3b3e5217bc0de20< d5f77f1dbb59feae81f88e44551e8e1d8a802d9a`	affected
		`90fdc1717b1862eb3d506733f3b3e5217bc0de20< 51fb1278aa57ae0fc54adaa786e1965362bed4fb`	affected
		`5.2`	affected
		`< 5.2`	unaffected
		`5.15.58≤ 5.15.*`	unaffected
		`5.17.14≤ 5.17.*`	unaffected
… +2 more rows

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I. Basic Information for CVE-2022-49328

Vulnerability Information

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Vulnerability Title

mt76: fix use-after-free by removing a non-RCU wcid pointer

Source: CVE Program / CVE List V5

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: mt76: fix use-after-free by removing a non-RCU wcid pointer Fixes an issue caught by KASAN about use-after-free in mt76_txq_schedule by protecting mtxq->wcid with rcu_lock between mt76_txq_schedule and sta_info_[alloc, free]. [18853.876689] ================================================================== [18853.876751] BUG: KASAN: use-after-free in mt76_txq_schedule+0x204/0xaf8 [mt76] [18853.876773] Read of size 8 at addr ffffffaf989a2138 by task mt76-tx phy0/883 [18853.876786] [18853.876810] CPU: 5 PID: 883 Comm: mt76-tx phy0 Not tainted 5.10.100-fix-510-56778d365941-kasan #5 0b01fbbcf41a530f52043508fec2e31a4215 [18853.876840] Call trace: [18853.876861] dump_backtrace+0x0/0x3ec [18853.876878] show_stack+0x20/0x2c [18853.876899] dump_stack+0x11c/0x1ac [18853.876918] print_address_description+0x74/0x514 [18853.876934] kasan_report+0x134/0x174 [18853.876948] __asan_report_load8_noabort+0x44/0x50 [18853.876976] mt76_txq_schedule+0x204/0xaf8 [mt76 074e03e4640e97fe7405ee1fab547b81c4fa45d2] [18853.877002] mt76_txq_schedule_all+0x2c/0x48 [mt76 074e03e4640e97fe7405ee1fab547b81c4fa45d2] [18853.877030] mt7921_tx_worker+0xa0/0x1cc [mt7921_common f0875ebac9d7b4754e1010549e7db50fbd90a047] [18853.877054] __mt76_worker_fn+0x190/0x22c [mt76 074e03e4640e97fe7405ee1fab547b81c4fa45d2] [18853.877071] kthread+0x2f8/0x3b8 [18853.877087] ret_from_fork+0x10/0x30 [18853.877098] [18853.877112] Allocated by task 941: [18853.877131] kasan_save_stack+0x38/0x68 [18853.877147] __kasan_kmalloc+0xd4/0xfc [18853.877163] kasan_kmalloc+0x10/0x1c [18853.877177] __kmalloc+0x264/0x3c4 [18853.877294] sta_info_alloc+0x460/0xf88 [mac80211] [18853.877410] ieee80211_prep_connection+0x204/0x1ee0 [mac80211] [18853.877523] ieee80211_mgd_auth+0x6c4/0xa4c [mac80211] [18853.877635] ieee80211_auth+0x20/0x2c [mac80211] [18853.877733] rdev_auth+0x7c/0x438 [cfg80211] [18853.877826] cfg80211_mlme_auth+0x26c/0x390 [cfg80211] [18853.877919] nl80211_authenticate+0x6d4/0x904 [cfg80211] [18853.877938] genl_rcv_msg+0x748/0x93c [18853.877954] netlink_rcv_skb+0x160/0x2a8 [18853.877969] genl_rcv+0x3c/0x54 [18853.877985] netlink_unicast_kernel+0x104/0x1ec [18853.877999] netlink_unicast+0x178/0x268 [18853.878015] netlink_sendmsg+0x3cc/0x5f0 [18853.878030] sock_sendmsg+0xb4/0xd8 [18853.878043] ____sys_sendmsg+0x2f8/0x53c [18853.878058] ___sys_sendmsg+0xe8/0x150 [18853.878071] __sys_sendmsg+0xc4/0x1f4 [18853.878087] __arm64_compat_sys_sendmsg+0x88/0x9c [18853.878101] el0_svc_common+0x1b4/0x390 [18853.878115] do_el0_svc_compat+0x8c/0xdc [18853.878131] el0_svc_compat+0x10/0x1c [18853.878146] el0_sync_compat_handler+0xa8/0xcc [18853.878161] el0_sync_compat+0x188/0x1c0 [18853.878171] [18853.878183] Freed by task 10927: [18853.878200] kasan_save_stack+0x38/0x68 [18853.878215] kasan_set_track+0x28/0x3c [18853.878228] kasan_set_free_info+0x24/0x48 [18853.878244] __kasan_slab_free+0x11c/0x154 [18853.878259] kasan_slab_free+0x14/0x24 [18853.878273] slab_free_freelist_hook+0xac/0x1b0 [18853.878287] kfree+0x104/0x390 [18853.878402] sta_info_free+0x198/0x210 [mac80211] [18853.878515] __sta_info_destroy_part2+0x230/0x2d4 [mac80211] [18853.878628] __sta_info_flush+0x300/0x37c [mac80211] [18853.878740] ieee80211_set_disassoc+0x2cc/0xa7c [mac80211] [18853.878851] ieee80211_mgd_deauth+0x4a4/0x10a0 [mac80211] [18853.878962] ieee80211_deauth+0x20/0x2c [mac80211] [18853.879057] rdev_deauth+0x7c/0x438 [cfg80211] [18853.879150] cfg80211_mlme_deauth+0x274/0x414 [cfg80211] [18853.879243] cfg80211_mlme_down+0xe4/0x118 [cfg80211] [18853.879335] cfg80211_disconnect+0x218/0x2d8 [cfg80211] [18853.879427] __cfg80211_leave+0x17c/0x240 [cfg80211] [18853.879519] cfg80211_leave+0x3c/0x58 [cfg80211] [18853.879611] wiphy_suspend+0xdc/0x200 [cfg80211] [18853.879628] dpm_run_callback+0x58/0x408 [18853.879642] __device_suspend+0x4cc/0x864 [18853.879658] async_suspend+0x34/0xf4 [18 ---truncated---

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

N/A

Source: CVE Program / CVE List V5

Vulnerability Title

Linux kernel 安全漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于mt76在移除非RCU wcid指针时发生释放后重用。

Source: CNNVD (China National Vulnerability Database)

CVSS Information

N/A

Source: CNNVD (China National Vulnerability Database)

Vulnerability Type

N/A

Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Linux	Linux	90fdc1717b1862eb3d506733f3b3e5217bc0de20 ~ 4448327b41738dbfcda680eb4935ff835568f468	-
Linux	Linux	5.2	-

II. Public POCs for CVE-2022-49328

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

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III. Intelligence Information for CVE-2022-49328

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Patches & Fixes for CVE-2022-49328 (4)

https://www.cve.org/CVERecord?id=CVE-2022-49328

Same Patch Batch · Linux · 2025-02-26 · 706 CVEs total

CVE-2022-49418	9.8 CRITICAL	NFSv4: Fix free of uninitialized nfs4_label on referral lookup.
CVE-2022-49407	9.8 CRITICAL	dlm: fix plock invalid read
CVE-2022-49362	9.8 CRITICAL	NFSD: Fix potential use-after-free in nfsd_file_put()
CVE-2022-49356	9.8 CRITICAL	SUNRPC: Trap RDMA segment overflows
CVE-2022-49561	9.8 CRITICAL	netfilter: conntrack: re-fetch conntrack after insertion
CVE-2022-49280	9.8 CRITICAL	NFSD: prevent underflow in nfssvc_decode_writeargs()
CVE-2022-49260	9.8 CRITICAL	crypto: hisilicon/sec - fix the aead software fallback for engine
CVE-2022-49094	9.8 CRITICAL	net/tls: fix slab-out-of-bounds bug in decrypt_internal
CVE-2022-49093	9.8 CRITICAL	skbuff: fix coalescing for page_pool fragment recycling
CVE-2022-49201	9.8 CRITICAL	ibmvnic: fix race between xmit and reset
CVE-2022-49194	9.8 CRITICAL	net: bcmgenet: Use stronger register read/writes to assure ordering
CVE-2022-49149	9.8 CRITICAL	rxrpc: Fix call timer start racing with call destruction
CVE-2022-49058	9.1 CRITICAL	cifs: potential buffer overflow in handling symlinks
CVE-2022-49519	8.8 HIGH	ath10k: skip ath10k_halt during suspend for driver state RESTARTING
CVE-2022-49500	8.8 HIGH	wl1251: dynamically allocate memory used for DMA
CVE-2022-49470	8.8 HIGH	Bluetooth: btmtksdio: fix use-after-free at btmtksdio_recv_event
CVE-2022-49238	8.8 HIGH	ath11k: free peer for station when disconnect from AP for QCA6390/WCN6855
CVE-2022-49479	8.8 HIGH	mt76: fix tx status related use-after-free race on station removal
CVE-2022-49535	8.8 HIGH	scsi: lpfc: Fix null pointer dereference after failing to issue FLOGI and PLOGI
CVE-2022-49114	8.8 HIGH	scsi: libfc: Fix use after free in fc_exch_abts_resp()

Showing top 20 of 706 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux

Same vendor: Linux

V. Comments for CVE-2022-49328

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Goal Reached Thanks to every supporter — we hit 100%!

CVE-2022-49328— mt76: fix use-after-free by removing a non-RCU wcid pointer

Quick assessment

Possible ATT&CK Techniques 2 AI

Affected Version Matrix 10

I. Basic Information for CVE-2022-49328

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2022-49328

III. Intelligence Information for CVE-2022-49328

Patches & Fixes for CVE-2022-49328 (4)

Same Patch Batch · Linux · 2025-02-26 · 706 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2022-49328

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