298 lines
15 KiB
JSON
298 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-2026-74669",
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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": "2026-08-15T05:44:03.924Z",
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"datePublished": "2026-08-22T15:32:40.221Z",
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"dateUpdated": "2026-10-16T19:16:08.572Z"
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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": "2026-08-25T05:41:24.114Z"
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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\nipvs: clear IPv4 options after rebasing tunnel ICMP errors\n\nip_vs_in_icmp() rebases an skb from the outer ICMP packet to the\nquoted original request before passing it to icmp_send(). However,\nIPCB(skb)->opt still describes the outer IPv4 header.\n\nA timestamp option in the outer header can therefore leave an offset\nthat points into the quoted transport header after the rebase.\n__ip_options_echo() treats a byte at that stale location as the option\nlength and copies it into the fixed-size option storage on the\n__icmp_send() stack, causing a stack out-of-bounds write.\n\nClear the stale option metadata after resetting the network header.\nKeep the remaining control block fields, including the ingress\ninterface used by the ICMP response path."
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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:H/I:H/A:H",
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"baseScore": 9.8,
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"baseSeverity": "CRITICAL"
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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 bug is hit when a remote peer sends a crafted ICMP error to an IPVS load balancer; processing occurs in the IPv4 LOCAL_IN/FORWARD netfilter path on received network packets before icmp_send().\nAC:L - An attacker can reliably trigger the path by opening IPVS tunnel traffic, then sending an ICMP error whose outer IPv4 header includes a timestamp option and whose quoted payload aligns bytes at the stale option offset to a large length.\nPR:N - Exploitation requires only the ability to send IPv4/ICMP to the target; the remote attacker needs no local account, capability, or authentication on the victim host.\nUI:N - No victim user action is required beyond normal exposure of an IPVS tunnel load balancer to the network; exploitation is driven entirely by attacker-sent packets.\nS:U - Impact is confined to kernel memory/stack corruption and privilege boundaries within the host kernel; it does not cross into another security authority such as a VM guest or separate sandbox domain.\nC:H - The stale IPCB option metadata drives __ip_options_echo() to memcpy() from attacker-influenced skb bytes into a 40-byte stack buffer, enabling out-of-bounds kernel memory access that can disclose stack/kernel data.\nI:H - The stack out-of-bounds write in __icmp_send() is attacker-controlled in length and content via crafted quoted headers, providing a standard memory-corruption primitive that can corrupt return addresses and enable arbitrary kernel code execution.\nA:H - Corrupting the __icmp_send() stack frame can immediately panic or oops the kernel during ICMP processing, causing complete loss of availability on the load balancer."
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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/netfilter/ipvs/ip_vs_core.c"
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],
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"versions": [
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{
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"version": "f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e",
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"lessThan": "79ffa99202c944467e28b13b513bf2998732edff",
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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": "f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e",
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"lessThan": "c9413b50204738fbc429bb86bf01353c393a6c28",
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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": "f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e",
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"lessThan": "37c61b3745129cbd682c557b51345828120972e5",
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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": "f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e",
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"lessThan": "ed246dd85ebf27c1f6b7897834d40786c0ca3006",
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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": "f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e",
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"lessThan": "6f46fc460e9316062bdcdf89199eb5d7a33da33b",
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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": "f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e",
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"lessThan": "75eec935444db4af2123e0491936f6e273d7ea00",
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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": "f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e",
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"lessThan": "384b4dae14277d369221d187e9b3af56c79d2e50",
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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": "f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e",
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"lessThan": "e0ba936287dfe9783426aac27e5fd76fe35b38c9",
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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/netfilter/ipvs/ip_vs_core.c"
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],
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"versions": [
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{
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"version": "3.7",
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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": "3.7",
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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": "5.10.265",
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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": "5.15.216",
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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": "6.1.183",
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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": "6.6.152",
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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": "6.12.104",
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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": "6.18.45",
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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": "7.1.9",
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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": "3.7",
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"versionEndExcluding": "5.10.265"
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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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/79ffa99202c944467e28b13b513bf2998732edff"
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},
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{
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"url": "https://git.kernel.org/stable/c/c9413b50204738fbc429bb86bf01353c393a6c28"
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},
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{
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"url": "https://git.kernel.org/stable/c/37c61b3745129cbd682c557b51345828120972e5"
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},
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{
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"url": "https://git.kernel.org/stable/c/ed246dd85ebf27c1f6b7897834d40786c0ca3006"
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},
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{
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"url": "https://git.kernel.org/stable/c/6f46fc460e9316062bdcdf89199eb5d7a33da33b"
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},
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{
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"url": "https://git.kernel.org/stable/c/75eec935444db4af2123e0491936f6e273d7ea00"
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},
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{
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"url": "https://git.kernel.org/stable/c/384b4dae14277d369221d187e9b3af56c79d2e50"
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},
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{
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"url": "https://git.kernel.org/stable/c/e0ba936287dfe9783426aac27e5fd76fe35b38c9"
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}
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],
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"title": "ipvs: clear IPv4 options after rebasing tunnel ICMP errors",
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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-2026-74669",
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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": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T19:14:21.602938Z"
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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": "2026-10-16T19:16:08.572Z"
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}
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}
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]
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}
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} |