{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49328", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T02:08:31.538Z", "datePublished": "2025-02-26T02:10:49.590Z", "dateUpdated": "2026-08-15T12:22:36.617Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-15T12:22:36.617Z" }, "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->wcid 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": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "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—generate traffic that keeps TX queues active and force station removal via disconnect/deauth—and 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’s 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->wcid 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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "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" ], "versions": [ { "version": "90fdc1717b1862eb3d506733f3b3e5217bc0de20", "lessThan": "4448327b41738dbfcda680eb4935ff835568f468", "status": "affected", "versionType": "git" }, { "version": "90fdc1717b1862eb3d506733f3b3e5217bc0de20", "lessThan": "e55bcdd0bf34a8b10d45ce80ebb3164c5292a17d", "status": "affected", "versionType": "git" }, { "version": "90fdc1717b1862eb3d506733f3b3e5217bc0de20", "lessThan": "d5f77f1dbb59feae81f88e44551e8e1d8a802d9a", "status": "affected", "versionType": "git" }, { "version": "90fdc1717b1862eb3d506733f3b3e5217bc0de20", "lessThan": "51fb1278aa57ae0fc54adaa786e1965362bed4fb", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "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" ], "versions": [ { "version": "5.2", "status": "affected" }, { "version": "0", "lessThan": "5.2", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.58", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17.14", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18.3", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "5.15.58" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "5.17.14" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "5.18.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "5.19" } ] } ] } ], "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" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2022-49328", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-02-27T18:16:47.103514Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-27T18:22:34.046Z" } } ] } }