264 lines
14 KiB
JSON
264 lines
14 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-2026-98311",
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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": "2026-09-25T10:25:14.339Z",
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"datePublished": "2026-10-06T08:46:07.562Z",
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"dateUpdated": "2026-10-19T09:17:21.813Z"
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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": "2026-10-19T09:17:21.813Z"
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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: virt_wifi: don't transfer operstate before register\n\nvirt_wifi_newlink() calls netif_stacked_transfer_operstate() before\nregister_netdevice(). If the lower device is dormant, that queues the\nnew netdev on lweventlist while it is still uninitialized. If\nregistration fails after that, for example because of an invalid name\nsuch as \"bad/name\", free_netdev() immediately frees the object. A\nlater linkwatch_fire_event() then use-after-frees the list entry.\n\nMove the transfer to after netdev_upper_dev_link(), as macvlan and\nipvlan already do."
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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 trigger is a local RTM_NEWLINK netlink request of kind \"virt_wifi\" handled by virt_wifi_newlink(). No remote peer or WiFi frame supplies any input. The bug is a fault in the order of steps when creating the device.\nAC:L - The attacker sets up the state and triggers it alone. They bring the lower device (e.g. lo) up and set it dormant via IFLA_OPERSTATE, then send RTM_NEWLINK with an invalid name like \"bad/name\". netif_dormant_on() queues the device on lweventlist, register_netdevice() fails and free_netdev() frees the device while it is still queued. No race is involved.\nPR:L - rtnetlink_rcv_msg() and __rtnl_newlink() check CAP_NET_ADMIN only against the user namespace that owns the netns, so an unprivileged user can get it with unshare -Urn. __rtnl_newlink() also auto-loads rtnl-link-virt_wifi through request_module().\nUI:N - No victim action is needed; the attacker's own netlink messages create the dormant lower device, the failing virt_wifi link and the queued linkwatch event.\nS:U - Memory in the same kernel is corrupted and stays within the kernel's own security authority. No VM, IOMMU or sandbox boundary is crossed.\nC:H - The freed net_device is still linked into the global lweventlist. linkwatch_do_dev() later reads it (flags, state, qdisc pointers), so the attacker can reclaim the freed object with controlled data and use the resulting reads to leak memory.\nI:H - A list_add or list_del on lweventlist writes through link_watch_list into freed memory. With a reclaimed object, linkwatch_do_dev() calls dev_activate() or dev_deactivate() on qdisc pointers the attacker controls, which allows corrupting memory and hijacking control flow.\nA:H - Even without careful exploitation, the queued linkwatch_event work or any later linkwatch_fire_event() corrupts list memory or touches freed memory. That causes a kernel oops or panic, and the attacker can repeat it."
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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/virtual/virt_wifi.c"
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],
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"versions": [
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{
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"version": "c7cdba31ed8b87526db978976392802d3f93110c",
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"lessThan": "ee9ea1afd6990def51d52b3a0aecd5cfcc951da0",
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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": "c7cdba31ed8b87526db978976392802d3f93110c",
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"lessThan": "9ce26201f6dedf3fa02b97da8c67ee6f6c5f7225",
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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": "c7cdba31ed8b87526db978976392802d3f93110c",
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"lessThan": "f9526054c2b2cace5916b7225603d008834ec011",
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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": "c7cdba31ed8b87526db978976392802d3f93110c",
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"lessThan": "e8304e25c6dabb8accf38b807969438d0ce84fd7",
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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": "c7cdba31ed8b87526db978976392802d3f93110c",
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"lessThan": "ca49763c42c1089d654bf11b037980a9ede3772c",
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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": "c7cdba31ed8b87526db978976392802d3f93110c",
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"lessThan": "293c56a66510bb7de073a1aba388e38abddff1fb",
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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": "c7cdba31ed8b87526db978976392802d3f93110c",
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"lessThan": "b808a9af5fd21f9c68b0d024eda7535b5dce6a4e",
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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": "c7cdba31ed8b87526db978976392802d3f93110c",
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"lessThan": "e5c8d7acd31b27057ea42cd405d0b3ece097bc89",
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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/virtual/virt_wifi.c"
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],
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"versions": [
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{
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"version": "5.0",
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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": "5.0",
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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": "5.10.271",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.222",
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"lessThanOrEqual": "5.15.*",
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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": "6.1.189",
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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": "6.6.158",
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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": "6.12.112",
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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": "6.18.54",
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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": "7.2.8",
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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": "5.0",
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"versionEndExcluding": "5.10.271"
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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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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.0",
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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/ee9ea1afd6990def51d52b3a0aecd5cfcc951da0"
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},
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{
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"url": "https://git.kernel.org/stable/c/9ce26201f6dedf3fa02b97da8c67ee6f6c5f7225"
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},
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{
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"url": "https://git.kernel.org/stable/c/f9526054c2b2cace5916b7225603d008834ec011"
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},
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{
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"url": "https://git.kernel.org/stable/c/e8304e25c6dabb8accf38b807969438d0ce84fd7"
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},
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{
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"url": "https://git.kernel.org/stable/c/ca49763c42c1089d654bf11b037980a9ede3772c"
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},
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{
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"url": "https://git.kernel.org/stable/c/293c56a66510bb7de073a1aba388e38abddff1fb"
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},
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{
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"url": "https://git.kernel.org/stable/c/b808a9af5fd21f9c68b0d024eda7535b5dce6a4e"
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},
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{
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"url": "https://git.kernel.org/stable/c/e5c8d7acd31b27057ea42cd405d0b3ece097bc89"
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}
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],
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"title": "wifi: virt_wifi: don't transfer operstate before register",
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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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}
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} |