247 lines
14 KiB
JSON
247 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-2026-64574",
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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": "2026-07-19T15:36:31.797Z",
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"datePublished": "2026-08-05T08:08:10.272Z",
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"dateUpdated": "2026-10-19T20:48:42.499Z"
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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": "2026-08-17T04:57:54.008Z"
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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: mac80211: tear down new links on vif update error path\n\nWhen ieee80211_vif_update_links() adds new links it allocates a link\ncontainer for each and calls ieee80211_link_init() (which registers the\nper-link debugfs files with file->private_data pointing into the container)\nand ieee80211_link_setup(). If the subsequent drv_change_vif_links() fails,\nthe error path restores the old pointers and jumps to 'free', which frees\nthe new containers but never removes their debugfs entries or stops the\nlinks. The debugfs files survive with file->private_data dangling at the\nfreed container, so a later open()+read() (e.g. link-1/txpower)\ndereferences freed memory in ieee80211_if_read_link(), a use-after-free.\n\nThe removal path already dismantles links correctly via\nieee80211_tear_down_links(), which removes each link's keys and debugfs\nentries and calls ieee80211_link_stop(); the add path on the error branch\ndoes not. Commit be1ba9ed221f (\"wifi: mac80211: avoid weird state in error\npath\") hardened this same error path for the link-removal case\n(new_links == 0) but left the newly-added links' teardown unaddressed.\n\ndrv_change_vif_links() can fail at runtime on MLO drivers (internal\nallocation / queue / firmware command failures).\n\nRemove the new links' debugfs entries and stop them before freeing.\n\n BUG: KASAN: slab-use-after-free in ieee80211_if_read_link (net/mac80211/debugfs_netdev.c:127)\n Read of size 8 at addr ffff888011290000 by task exploit/145\n Call Trace:\n ...\n ieee80211_if_read_link (net/mac80211/debugfs_netdev.c:127)\n short_proxy_read (fs/debugfs/file.c:373)\n vfs_read (fs/read_write.c:572)\n ksys_read (fs/read_write.c:716)\n do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n ...\n Oops: general protection fault, probably for non-canonical address 0xdffffc000000000a\n RIP: 0010:ieee80211_if_read_link (net/mac80211/debugfs_netdev.c:127)\n Kernel panic - not syncing: Fatal exception"
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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 bug is reached via local nl80211 link updates (NL80211_CMD_ADD_LINK / ieee80211_vif_set_links → ieee80211_vif_update_links) and completed by a local debugfs open/read of the dangling per-link file, not by processing over-the-air frames alone.\nAC:L - An attacker can reliably force the error path by adding an MLO AP link whose MAC duplicates an existing link so ieee80211_check_dup_link_addrs() fails after ieee80211_link_init() already registered debugfs, then read the leftover file; no attacker-independent condition is required.\nPR:L - NL80211_CMD_ADD_LINK is gated by GENL_UNS_ADMIN_PERM (CAP_NET_ADMIN in the netns user_ns), which an unprivileged user can obtain via user/net namespaces or common WiFi management paths, so privileges are Low rather than init-namespace root.\nUI:N - The attacker issues the nl80211 ADD_LINK sequence and the subsequent debugfs read themselves; no separate victim action such as mounting a filesystem or opening a hostile file is required.\nS:U - The use-after-free and resulting kernel memory corruption stay within the host mac80211/debugfs authority and do not cross a VM, IOMMU, or other separate security boundary.\nC:H - Dangling debugfs file->private_data points at the freed link_container; reading it (ieee80211_if_read_link) is a slab use-after-free that can be reclaimed/sprayed for arbitrary kernel memory disclosure.\nI:H - The same freed link object is the debugfs private_data for readable/writable per-link files, so UAF reclaim enables attacker-controlled structure contents and control-flow hijack consistent with kernel UAF integrity High.\nA:H - The fix commit’s KASAN slab-use-after-free in ieee80211_if_read_link leads to a general protection fault and kernel panic, so availability impact is High even without full 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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"net/mac80211/link.c"
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],
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"versions": [
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{
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"version": "170cd6a66d9a164180eb4dc72d50afa6ce1ce566",
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"lessThan": "329589417214d3b7221432e5b266ed2bba7ff674",
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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": "170cd6a66d9a164180eb4dc72d50afa6ce1ce566",
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"lessThan": "c57d97f381306bbfba174e8f708419e007824e0c",
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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": "170cd6a66d9a164180eb4dc72d50afa6ce1ce566",
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"lessThan": "0f7eaeb950adb77f71beb546e5ab30f90b41fe6f",
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"status": "affected",
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},
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{
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"lessThan": "901a73523e093beff123b54b1ceaf3113f18acc9",
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"status": "affected",
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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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"net/mac80211/link.c"
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],
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"versions": [
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{
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"version": "6.4",
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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": "6.4",
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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": "6.6.148",
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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": "6.12.101",
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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": "6.18.42",
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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": "6.4",
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.4",
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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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}
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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/329589417214d3b7221432e5b266ed2bba7ff674"
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},
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{
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"url": "https://git.kernel.org/stable/c/c57d97f381306bbfba174e8f708419e007824e0c"
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},
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{
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"url": "https://git.kernel.org/stable/c/0f7eaeb950adb77f71beb546e5ab30f90b41fe6f"
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},
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{
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"url": "https://git.kernel.org/stable/c/901a73523e093beff123b54b1ceaf3113f18acc9"
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},
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{
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"url": "https://git.kernel.org/stable/c/952c02b33f56207a160421bcd61e7ac53c9c59ae"
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}
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],
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"title": "wifi: mac80211: tear down new links on vif update error path",
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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-2026-64574",
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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": "2026-10-16T15:43:06.568130Z"
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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-416",
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"description": "CWE-416 Use After Free"
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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": "2026-10-19T20:48:42.499Z"
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}
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}
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]
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}
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} |