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EUVD-2026-353013
European Vulnerability Database identifier assigned by ENISAReserved
2026-10-02 08:21
Assigner
ENISA
Alias of
a CVE record, shown under related vulnerabilities.
This identifier carries no description, severity or references of its own:
they belong to that CVE.
{
"assigner": "ENISA",
"date_reserved": "2026-10-02T08:21:34.647407+00:00",
"id": "EUVD-2026-353013"
}
CVE-2022-49328 (GCVE-0-2022-49328)
Vulnerability from cvelistv5 – Published: 2025-02-26 02:10 – Updated: 2026-08-15 12:22
VLAI
EPSS
VEX
Title
mt76: fix use-after-free by removing a non-RCU wcid pointer
Summary
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---
Severity
8.8 (High)
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-27 18:16 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
90fdc1717b1862eb3d506733f3b3e5217bc0de20 , < 4448327b41738dbfcda680eb4935ff835568f468
(git)
Affected: 90fdc1717b1862eb3d506733f3b3e5217bc0de20 , < e55bcdd0bf34a8b10d45ce80ebb3164c5292a17d (git) Affected: 90fdc1717b1862eb3d506733f3b3e5217bc0de20 , < d5f77f1dbb59feae81f88e44551e8e1d8a802d9a (git) Affected: 90fdc1717b1862eb3d506733f3b3e5217bc0de20 , < 51fb1278aa57ae0fc54adaa786e1965362bed4fb (git) |
|
| Linux | Linux |
Affected:
5.2
Unaffected: 0 , < 5.2 (semver) Unaffected: 5.15.58 , ≤ 5.15.* (semver) Unaffected: 5.17.14 , ≤ 5.17.* (semver) Unaffected: 5.18.3 , ≤ 5.18.* (semver) Unaffected: 5.19 , ≤ * (original_commit_for_fix) |
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2022-49328",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-02-27T18:16:47.103514Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-416",
"description": "CWE-416 Use After Free",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-02-27T18:22:34.046Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/wireless/mediatek/mt76/mac80211.c",
"drivers/net/wireless/mediatek/mt76/mt76.h",
"drivers/net/wireless/mediatek/mt76/mt7603/main.c",
"drivers/net/wireless/mediatek/mt76/mt7615/main.c",
"drivers/net/wireless/mediatek/mt76/mt76x02_util.c",
"drivers/net/wireless/mediatek/mt76/mt7915/main.c",
"drivers/net/wireless/mediatek/mt76/mt7921/main.c",
"drivers/net/wireless/mediatek/mt76/tx.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "4448327b41738dbfcda680eb4935ff835568f468",
"status": "affected",
"version": "90fdc1717b1862eb3d506733f3b3e5217bc0de20",
"versionType": "git"
},
{
"lessThan": "e55bcdd0bf34a8b10d45ce80ebb3164c5292a17d",
"status": "affected",
"version": "90fdc1717b1862eb3d506733f3b3e5217bc0de20",
"versionType": "git"
},
{
"lessThan": "d5f77f1dbb59feae81f88e44551e8e1d8a802d9a",
"status": "affected",
"version": "90fdc1717b1862eb3d506733f3b3e5217bc0de20",
"versionType": "git"
},
{
"lessThan": "51fb1278aa57ae0fc54adaa786e1965362bed4fb",
"status": "affected",
"version": "90fdc1717b1862eb3d506733f3b3e5217bc0de20",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/net/wireless/mediatek/mt76/mac80211.c",
"drivers/net/wireless/mediatek/mt76/mt76.h",
"drivers/net/wireless/mediatek/mt76/mt7603/main.c",
"drivers/net/wireless/mediatek/mt76/mt7615/main.c",
"drivers/net/wireless/mediatek/mt76/mt76x02_util.c",
"drivers/net/wireless/mediatek/mt76/mt7915/main.c",
"drivers/net/wireless/mediatek/mt76/mt7921/main.c",
"drivers/net/wireless/mediatek/mt76/tx.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.2"
},
{
"lessThan": "5.2",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.58",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.17.*",
"status": "unaffected",
"version": "5.17.14",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.18.*",
"status": "unaffected",
"version": "5.18.3",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "5.19",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.58",
"versionStartIncluding": "5.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.17.14",
"versionStartIncluding": "5.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.18.3",
"versionStartIncluding": "5.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.19",
"versionStartIncluding": "5.2",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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---"
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 8.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:A - The UAF is in the mt76 WiFi TX scheduling path during station removal; mt76 commonly runs as an AP (OpenWrt/mt7615/mt7915) or client where an on-link WiFi peer can force disassoc/deauth and race concurrent TX. This is same-segment wireless reachability, not internet-remote or host-local-only.\nAC:L - The attacker can drive both sides of the race\u2014generate traffic that keeps TX queues active and force station removal via disconnect/deauth\u2014and can retry indefinitely. Attacker-controlled races and UAFs score AC:L.\nPR:N - Station removal and in-flight TX are reachable from the wireless medium (peer deauth/disassoc or a client leaving an mt76 AP) with no privileges on the host kernel. No CAP_NET_ADMIN or local account is required in the AP/hotspot worst case.\nUI:N - Exploitation needs no victim user action beyond normal network operation; the attacker triggers disconnect and concurrent TX themselves.\nS:U - This is in-kernel memory corruption within the host kernel\u2019s security authority, not a VM/IOMMU/sandbox boundary crossing.\nC:H - mt76_txq_schedule dereferences a freed sta-embedded wcid via the non-RCU mtxq-\u003ewcid pointer; UAF enables control of freed object contents and thus arbitrary read primitives.\nI:H - The same wcid UAF is heap memory corruption exploitable for arbitrary write and control-flow hijack via TX scheduling after station free.\nA:H - Use-after-free on the TX worker path can oops/panic the kernel even without full exploitation, so availability impact is High."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-15T12:22:36.617Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/4448327b41738dbfcda680eb4935ff835568f468"
},
{
"url": "https://git.kernel.org/stable/c/e55bcdd0bf34a8b10d45ce80ebb3164c5292a17d"
},
{
"url": "https://git.kernel.org/stable/c/d5f77f1dbb59feae81f88e44551e8e1d8a802d9a"
},
{
"url": "https://git.kernel.org/stable/c/51fb1278aa57ae0fc54adaa786e1965362bed4fb"
}
],
"title": "mt76: fix use-after-free by removing a non-RCU wcid pointer",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-49328",
"datePublished": "2025-02-26T02:10:49.590Z",
"dateReserved": "2025-02-26T02:08:31.538Z",
"dateUpdated": "2026-08-15T12:22:36.617Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Loading…
Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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