314 lines
16 KiB
JSON
314 lines
16 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-2026-45859",
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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": "2026-05-13T15:03:33.079Z",
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"datePublished": "2026-05-27T12:15:39.322Z",
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"dateUpdated": "2026-10-30T12:25:38.053Z"
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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": "2026-10-30T12:25:38.053Z"
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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\nnetfilter: nfnetlink_queue: do shared-unconfirmed check before segmentation\n\nUlrich reports a regression with nfqueue:\n\nIf an application did not set the 'F_GSO' capability flag and a gso\npacket with an unconfirmed nf_conn entry is received all packets are\nnow dropped instead of queued, because the check happens after\nskb_gso_segment(). In that case, we did have exclusive ownership\nof the skb and its associated conntrack entry. The elevated use\ncount is due to skb_clone happening via skb_gso_segment().\n\nMove the check so that its peformed vs. the aggregated packet.\n\nThen, annotate the individual segments except the first one so we\ncan do a 2nd check at reinject time.\n\nFor the normal case, where userspace does in-order reinjects, this avoids\npacket drops: first reinjected segment continues traversal and confirms\nentry, remaining segments observe the confirmed entry.\n\nWhile at it, simplify nf_ct_drop_unconfirmed(): We only care about\nunconfirmed entries with a refcnt > 1, there is no need to special-case\ndying entries.\n\nThis only happens with UDP. With TCP, the only unconfirmed packet will\nbe the TCP SYN, those aren't aggregated by GRO.\n\nNext patch adds a udpgro test case to cover this scenario."
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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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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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:N - The vulnerable nfnetlink_queue path processes packets that hit an NFQUEUE netfilter verdict; GRO-aggregated UDP traffic received from the network reaches it, so the dropping condition is triggered by remote network packets.\nAC:L - Once an nfqueue without F_GSO exists, an attacker reliably triggers the drop by sending a UDP burst that GRO coalesces into a GSO skb for a new (unconfirmed) flow; no uncontrollable condition is required.\nPR:N - Triggering the condition requires only sending network traffic to the host; no authentication or privileges are needed by the remote sender.\nUI:N - The packet drop occurs automatically during kernel packet processing with no victim interaction.\nS:U - The impact is confined to the kernel's own network packet processing; no security boundary is crossed.\nC:N - The bug only causes packets to be dropped; no kernel memory is read or disclosed.\nI:N - No data is modified or written; dropped packets are simply not delivered, which is an availability rather than integrity effect.\nA:H - All GSO-aggregated UDP packets of new (unconfirmed) conntrack flows are dropped on a non-F_GSO nfqueue, denying establishment/processing of those new flows — a sustained, network-triggerable denial of that traffic class."
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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/netfilter/nf_queue.h",
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"net/netfilter/nfnetlink_queue.c"
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],
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"versions": [
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{
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"version": "6dcc8ba8a6074bb79040f502dc66ad23a58a1c86",
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"lessThan": "4666688657e1054278b836b825fb88b2907e2da2",
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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": "74e6eb7fd27ef1ccc68041dbc66e6d80d2e4a1a0",
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"lessThan": "aead84bdacd77e08357fd718e5dcaffaf387f3c3",
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"status": "affected",
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},
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{
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"version": "7d8dc1c7be8d3509e8f5164dd5df64c8e34d7eeb",
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"status": "affected",
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"status": "affected",
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},
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"lessThan": "b740e7ddd7ca0dbfeafca3f5e52717206cf28524",
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"status": "affected",
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},
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{
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"version": "7d8dc1c7be8d3509e8f5164dd5df64c8e34d7eeb",
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"lessThan": "207b3ebacb6113acaaec0d171d5307032c690004",
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"status": "affected",
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},
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{
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"version": "6c4a0ba674f410ab99a30a16f32dac0ebfed5cd3",
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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": "025b3326c5c409b372d0103ad30f174e55adbd1b",
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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": "6.1.107",
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"lessThan": "6.1.191",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.6.48",
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"lessThan": "6.6.160",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.15.166",
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"lessThan": "5.16",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.10.7",
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"lessThan": "6.11",
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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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"include/net/netfilter/nf_queue.h",
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"net/netfilter/nfnetlink_queue.c"
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],
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"versions": [
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{
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"version": "6.11",
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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": "6.11",
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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": "6.12.75",
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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": "6.18.14",
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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": "6.19.4",
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"lessThanOrEqual": "6.19.*",
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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": "7.0",
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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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"operator": "OR",
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"versionStartIncluding": "6.1.107",
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"versionEndExcluding": "6.1.191"
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"references": [
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"url": "https://git.kernel.org/stable/c/4666688657e1054278b836b825fb88b2907e2da2"
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},
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{
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"url": "https://git.kernel.org/stable/c/aead84bdacd77e08357fd718e5dcaffaf387f3c3"
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},
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{
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"url": "https://git.kernel.org/stable/c/79b713ef4261a8ead96af4703f89d0b5f25532e2"
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},
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{
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"url": "https://git.kernel.org/stable/c/23901aa6b8a2f294c4b774436b4691f3ff863a8f"
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{
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"url": "https://git.kernel.org/stable/c/b740e7ddd7ca0dbfeafca3f5e52717206cf28524"
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"url": "https://git.kernel.org/stable/c/207b3ebacb6113acaaec0d171d5307032c690004"
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}
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],
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"title": "netfilter: nfnetlink_queue: do shared-unconfirmed check before segmentation",
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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-2026-45859",
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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": "yes"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:18:05.838159Z"
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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-400",
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"description": "CWE-400 Uncontrolled Resource Consumption"
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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": "2026-10-19T19:26:38.615Z"
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}
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}
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]
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}
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} |