180 lines
10 KiB
JSON
180 lines
10 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-90380",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-11T19:38:34.809Z",
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"datePublished": "2026-09-17T16:09:17.948Z",
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"dateUpdated": "2026-10-19T09:02:39.607Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-19T09:02:39.607Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete\n\nA use-after-free issue occurs in mt76_rx_poll_complete due to a race\ncondition. The STA has already been removed, but the rx_status still\nhad a pointer to the wcid in the STA.\n\nSet the links' wcid pointers to be NULL for a MLD in\nmt7925_sta_pre_rcu_remove()\n\nBUG: KASAN: invalid-access in mt76_rx_poll_complete+0x280/0x470\nCall trace:\ndump_backtrace+0xec/0x128\nshow_stack+0x18/0x28\ndump_stack_lvl+0x40/0xc8\nprint_report+0x1b8/0x710\nkasan_report+0xe0/0x144\ndo_bad_area+0x120/0x260\ndo_tag_check_fault+0x20/0x34\ndo_mem_abort+0x54/0xa8\nel1_abort+0x3c/0x5c\nel1h_64_sync_handler+0x40/0xcc\nel1h_64_sync+0x7c/0x80\nmt76_rx_poll_complete+0x280/0x470\nmt76_dma_rx_poll+0x114/0x51c\nmt792x_poll_rx+0x60/0xf8\nnapi_threaded_poll_loop+0xe0/0x450\nnapi_threaded_poll+0x80/0x9c\nkthread+0x11c/0x158\nret_from_fork+0x10/0x20"
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:A - An 802.11be MLO peer's frames are DMA'd into mt792x_poll_rx→mt76_dma_rx_poll→mt7925_queue_rx_skb→mt7925_mac_fill_rx, which stores status->wcid from MT_RXD1_NORMAL_WLAN_IDX via mt792x_rx_get_wcid(); those bytes arrive over WiFi radio, which is adjacent rather than a routable IP transport.\nAC:L - The attacker drives both sides: data frames on a non-default MLO link keep mt76_rx_poll_complete using a secondary mt792x_link_sta.wcid that mt76_sta_pre_rcu_remove never NULLs, while a deauth/disassoc runs __sta_info_destroy. mt7925_mac_link_sta_remove then sleeps in MCU commands before clearing that idx, so the race is attacker-retryable.\nPR:N - mt76_rx_poll_complete and ieee80211_rx_mgmt_deauth→ieee80211_set_disassoc run on the WiFi RX path with no Linux credential or capability check; a radio-range MLO AP sending deauth plus data is enough, with no local account on the mt7925 client.\nUI:N - Once the mt7925 station VIF is already in an MLO association (WIPHY_FLAG_SUPPORTS_MLO is set only for NL80211_IFTYPE_STATION), the attacker triggers STA teardown and the concurrent RX by transmitting; no mount, click, or other victim action is required at exploit time.\nS:U - The UAF is of the mt792x_link_sta.wcid published in dev->wcid[] and later used in mt76_check_sta/mt76_rx_complete inside this host kernel; it does not cross a VM, IOMMU, or guest/host boundary.\nC:H - After the MLD STA is freed, mt76_check_sta and mt76_rx_convert still dereference status->wcid (wcid->sta, wcid->link_valid/link_id, wcid_to_sta()) from skb->cb, a use-after-free of the attacker-reallocatable mt792x_link_sta that enables arbitrary kernel reads.\nI:H - The same dangling wcid is written in mt76_check_sta (ewma_signal_add, wcid->inactive_count, PS flag bits) and in mt76_check_ccmp_pn (memcpy into wcid->rx_key_pn[] from the frame IV), giving a kernel write primitive through the freed mt792x_link_sta.\nA:H - KASAN already reports invalid-access in mt76_rx_poll_complete when the RX NAPI uses the freed wcid after STA removal; that use-after-free oopses or panics the kernel even without a full exploit."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/wireless/mediatek/mt76/mt7925/main.c"
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],
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"versions": [
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{
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"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5",
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"lessThan": "aaf414bf81ab4b680580871784b0b929818188eb",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5",
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"lessThan": "2aa3d3b9fac9163e9226e35556607ae3f75be21e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5",
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"lessThan": "b250943f3f8351385a17972bda001664a5c51008",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "c948b5da6bbec742b433138e3e3f9537a85af2e5",
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"lessThan": "217f9e7bb02558759be9d9ecfe532e9708741c50",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/wireless/mediatek/mt76/mt7925/main.c"
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],
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"versions": [
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{
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"version": "6.7",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.7",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.110",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.57",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.6",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.7",
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"versionEndExcluding": "6.12.110"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.7",
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"versionEndExcluding": "6.18.57"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.7",
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"versionEndExcluding": "7.2.6"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.7",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/aaf414bf81ab4b680580871784b0b929818188eb"
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},
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{
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"url": "https://git.kernel.org/stable/c/2aa3d3b9fac9163e9226e35556607ae3f75be21e"
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},
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{
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"url": "https://git.kernel.org/stable/c/b250943f3f8351385a17972bda001664a5c51008"
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},
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{
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"url": "https://git.kernel.org/stable/c/217f9e7bb02558759be9d9ecfe532e9708741c50"
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}
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],
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"title": "wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete",
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"x_generator": {
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"engine": "bippy-1.2.0"
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} |