291 lines
15 KiB
JSON
291 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-2025-21979",
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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": "2024-12-29T08:45:45.798Z",
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"datePublished": "2025-04-01T15:47:08.699Z",
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"dateUpdated": "2026-08-05T11:55:49.695Z"
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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": "2026-08-05T11:55:49.695Z"
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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: cancel wiphy_work before freeing wiphy\n\nA wiphy_work can be queued from the moment the wiphy is allocated and\ninitialized (i.e. wiphy_new_nm). When a wiphy_work is queued, the\nrdev::wiphy_work is getting queued.\n\nIf wiphy_free is called before the rdev::wiphy_work had a chance to run,\nthe wiphy memory will be freed, and then when it eventally gets to run\nit'll use invalid memory.\n\nFix this by canceling the work before freeing the wiphy."
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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 wiphy lifecycle operations that trigger the free (`HWSIM_CMD_NEW_RADIO`/`DEL_RADIO` generic netlink, `RTM_NEWLINK`/`DELLINK` for virt_wifi, netns teardown, module/device removal) are all local syscall/netlink operations. Remote 802.11 frames can keep wiphy_work queued but cannot themselves free the wiphy, so the attacker must have local access.\nAC:L - The attacker drives both halves — they allocate the wiphy, queue the wiphy_work, and free the wiphy, and can hit deterministic failure paths in `wiphy_new_nm()`/`mac80211_hwsim_new_radio()` or simply loop create/destroy while widening the window with CPU load. Per kernel UAF guidance an attacker-created race is Low.\nPR:L - `hwsim_new_radio_nl`/`hwsim_del_radio_nl` are gated only by `GENL_UNS_ADMIN_PERM`, i.e. `netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)` on a `.netnsok` family, so any unprivileged user obtains it via `unshare -Urn`; virt_wifi's rtnetlink create/destroy is namespaced the same way. No real root in the init namespace is needed.\nUI:N - The attacker performs the entire sequence — allocate wiphy, queue work, free wiphy — from their own process with no victim participation. No mount, file open, or any other user action is involved.\nS:U - The use-after-free corrupts kernel heap memory and hijacks kernel control flow within the same security authority; no VM, hypervisor, or IOMMU/DMA boundary is crossed.\nC:H - The stale worker reads the work-list head and a `struct wiphy_work *` out of the freed `rdev`, so a heap-spray reclaim of the freed allocation gives the attacker control of those pointers; combined with the `list_del_init()` write primitive this is leverageable into arbitrary kernel memory disclosure.\nI:H - `list_del_init(&wk->entry)` writes attacker-influenced values through pointers read from freed memory (write-what-where), and `wk->func(&rdev->wiphy, wk)` is an indirect call through a function pointer read from freed memory — a direct control-flow hijack enabling arbitrary code execution.\nA:H - Even without exploitation the stale `cfg80211_wiphy_work()` takes a mutex and spinlock in freed, already-`mutex_destroy`'d memory and dereferences a garbage list head, producing a KASAN splat, oops, or panic; the attacker can retrigger it in a loop."
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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/wireless/core.c"
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],
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"versions": [
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{
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"version": "ddb1bfbf4ab5c753954d0cd728253b642934a9f2",
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"lessThan": "8930a3e1568cf534f86c8ed2def817c6d0528fc1",
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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": "3fcc6d7d5f40dad56dee7bde787b7e23edd4b93c",
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"lessThan": "0272d4af7f92997541d8bbf4c51918b93ded6ee2",
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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": "a3ee4dc84c4e9d14cb34dad095fd678127aca5b6",
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"lessThan": "75d262ad3c36d52852d764588fcd887f0fcd9138",
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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": "a3ee4dc84c4e9d14cb34dad095fd678127aca5b6",
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"lessThan": "a5158d67bff06cb6fea31be39aeb319fd908ed8e",
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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": "a3ee4dc84c4e9d14cb34dad095fd678127aca5b6",
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"lessThan": "dea22de162058216a90f2706f0d0b36f0ff309fd",
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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": "a3ee4dc84c4e9d14cb34dad095fd678127aca5b6",
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"lessThan": "72d520476a2fab6f3489e8388ab524985d6c4b90",
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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": "6.1.57",
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"lessThan": "6.1.132",
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"status": "affected",
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"versionType": "semver"
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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/wireless/core.c"
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],
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"versions": [
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{
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"version": "6.5",
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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": "6.5",
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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": "6.1.132",
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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": "6.6.84",
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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": "6.12.20",
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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": "6.13.8",
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"lessThanOrEqual": "6.13.*",
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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": "6.14",
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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": "6.1.57",
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"versionEndExcluding": "6.1.132"
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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": "6.5",
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"versionEndExcluding": "6.6.84"
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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": "6.5",
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"versionEndExcluding": "6.12.20"
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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": "6.5",
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"versionEndExcluding": "6.13.8"
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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": "6.5",
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"versionEndExcluding": "6.14"
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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/8930a3e1568cf534f86c8ed2def817c6d0528fc1"
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},
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{
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"url": "https://git.kernel.org/stable/c/0272d4af7f92997541d8bbf4c51918b93ded6ee2"
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},
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{
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"url": "https://git.kernel.org/stable/c/75d262ad3c36d52852d764588fcd887f0fcd9138"
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},
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{
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"url": "https://git.kernel.org/stable/c/a5158d67bff06cb6fea31be39aeb319fd908ed8e"
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},
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{
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"url": "https://git.kernel.org/stable/c/dea22de162058216a90f2706f0d0b36f0ff309fd"
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},
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{
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"url": "https://git.kernel.org/stable/c/72d520476a2fab6f3489e8388ab524985d6c4b90"
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}
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],
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"title": "wifi: cfg80211: cancel wiphy_work before freeing wiphy",
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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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"problemTypes": [
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{
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"descriptions": [
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{
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"type": "CWE",
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"cweId": "CWE-416",
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"lang": "en",
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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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"metrics": [
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{
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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 7.8,
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"attackVector": "LOCAL",
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"baseSeverity": "HIGH",
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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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"integrityImpact": "HIGH",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "HIGH"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2025-10-01T17:15:17.684537Z",
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"id": "CVE-2025-21979",
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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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"role": "CISA Coordinator",
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"version": "2.0.3"
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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": "2025-10-01T17:15:20.536Z"
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}
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},
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{
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
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}
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],
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2025-11-03T19:40:19.723Z"
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}
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}
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]
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}
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} |