276 lines
15 KiB
JSON
276 lines
15 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-2026-68404",
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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": "2026-07-30T09:28:09.390Z",
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"datePublished": "2026-08-10T12:04:24.241Z",
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"dateUpdated": "2026-10-30T12:28:29.915Z"
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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": "2026-10-30T12:28:29.915Z"
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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: cfg80211: use wiphy work for socket owner autodisconnect\n\nnl80211_netlink_notify() walks the cfg80211 wireless device list when a\nNETLINK_GENERIC socket is released. If the socket owns a connection, the\nnotifier queues the embedded wdev->disconnect_wk work item.\n\nThat work is a plain work_struct today. NETDEV_GOING_DOWN cancels it, but a\nNETLINK_URELEASE notifier that already observed conn_owner_nlportid can\nqueue it after that cancel returns. _cfg80211_unregister_wdev() then\nremoves the wdev from the list and waits for RCU readers, but\nsynchronize_net() does not drain work queued by such a reader.\n\nMake the autodisconnect work a wiphy_work instead. The callback already\nneeds the wiphy mutex, and wiphy_work runs under that mutex. This lets\nteardown cancel pending autodisconnect work while holding the mutex,\nwithout a cancel_work_sync() vs. worker locking concern.\n\nAlso cancel the wiphy work after list_del_rcu() and synchronize_net(). Any\nNETLINK_URELEASE notifier that had already reached the wdev list has then\neither queued the work and it is removed, or can no longer find the wdev."
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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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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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:L - The vulnerability is reached through local nl80211/generic-netlink operations: setting NL80211_ATTR_SOCKET_OWNER on a connect/join command, closing the owning netlink socket, and tearing down the wireless interface. No network or radio traffic is required, so the attack vector is Local.\nAC:L - The attacker controls both sides of the race — the NETLINK_URELEASE notification (by closing its own socket) and the wdev teardown (by downing/deleting the interface) — and can repeat the sequence in a tight loop until the work is queued after the cancel window.\nPR:L - The relevant nl80211 commands use GENL_UNS_ADMIN_PERM and the family is netnsok, and mac80211_hwsim's HWSIM_CMD_NEW_RADIO likewise creates a wiphy in the caller's netns (wiphy_net_set(genl_info_net(info))), so an unprivileged user in a user+net namespace (unshare -Urn) obtains the required CAP_NET_ADMIN.\nUI:N - The entire sequence — creating/owning the connection, closing the socket, and removing the interface — is performed by the attacker's own process with no victim action required.\nS:U - The use-after-free corrupts kernel heap memory within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The freed wireless_dev lives in the net_device private allocation; a use-after-free on that slab lets an attacker reclaim and inspect kernel heap contents, and cfg80211_autodisconnect_wk dereferences the stale object, enabling disclosure of arbitrary kernel memory.\nI:H - Queueing writes work list pointers into freed memory, and process_one_work() later loads work->func from the reclaimed allocation, giving an attacker who sprays the slab a controlled kernel function pointer call and thus arbitrary write/code execution.\nA:H - Running cfg80211_autodisconnect_wk against a freed wireless_dev dereferences stale pointers and drives disconnect paths on destroyed state, reliably producing an oops or panic even without successful exploitation."
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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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"include/net/cfg80211.h",
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"net/wireless/core.c",
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"net/wireless/core.h",
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"net/wireless/nl80211.c",
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"net/wireless/sme.c"
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],
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"versions": [
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{
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"version": "bd2522b168847106c1885f0319a2833bdf88bf9a",
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"lessThan": "23517673b1eecaec95e61dde285220d5a980cf3f",
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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": "bd2522b168847106c1885f0319a2833bdf88bf9a",
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"lessThan": "c55590e4c69e0fd194df6d20bc35381c201d99e1",
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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": "bd2522b168847106c1885f0319a2833bdf88bf9a",
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"lessThan": "4087a9ba4ece70297a4174afaa41c0b700302b65",
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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": "bd2522b168847106c1885f0319a2833bdf88bf9a",
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"lessThan": "c2ddd180bbee766cf7359473d623423ea9485d93",
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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": "bd2522b168847106c1885f0319a2833bdf88bf9a",
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"lessThan": "6d6123fef5a4af175cc6b6b12a03dd0f3c240b79",
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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": "bd2522b168847106c1885f0319a2833bdf88bf9a",
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"lessThan": "0c2ed186bbe14304415476d6707b747dddcd8583",
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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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"include/net/cfg80211.h",
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"net/wireless/core.c",
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"net/wireless/core.h",
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"net/wireless/nl80211.c",
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"net/wireless/sme.c"
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],
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"versions": [
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{
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"version": "4.11",
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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": "4.11",
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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": "6.1.191",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.160",
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"lessThanOrEqual": "6.6.*",
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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": "6.12.114",
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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": "7.1.6",
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"lessThanOrEqual": "7.1.*",
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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",
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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": "4.11",
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"versionEndExcluding": "6.1.191"
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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": "4.11",
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"versionEndExcluding": "6.6.160"
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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": "4.11",
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"versionEndExcluding": "6.12.114"
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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": "4.11",
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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": "4.11",
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"versionEndExcluding": "7.1.6"
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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": "4.11",
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"versionEndExcluding": "7.2"
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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/23517673b1eecaec95e61dde285220d5a980cf3f"
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},
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{
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"url": "https://git.kernel.org/stable/c/c55590e4c69e0fd194df6d20bc35381c201d99e1"
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},
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{
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"url": "https://git.kernel.org/stable/c/4087a9ba4ece70297a4174afaa41c0b700302b65"
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},
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{
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"url": "https://git.kernel.org/stable/c/c2ddd180bbee766cf7359473d623423ea9485d93"
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},
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{
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"url": "https://git.kernel.org/stable/c/6d6123fef5a4af175cc6b6b12a03dd0f3c240b79"
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},
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{
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"url": "https://git.kernel.org/stable/c/0c2ed186bbe14304415476d6707b747dddcd8583"
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}
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],
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"title": "wifi: cfg80211: use wiphy work for socket owner autodisconnect",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-68404",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:48:20.936552Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-662",
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"description": "CWE-662 Improper Synchronization"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-19T21:09:08.902Z"
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}
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}
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]
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}
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} |