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-2026-72136",
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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": "2026-08-09T03:40:39.908Z",
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"datePublished": "2026-08-15T05:53:11.072Z",
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"dateUpdated": "2026-10-16T18:44:58.796Z"
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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": "2026-08-17T05:40:46.616Z"
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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\nxfrm: xfrm_interface: require CAP_NET_ADMIN in the device netns for changelink\n\nxfrmi_changelink() operates on at most two netns, dev_net(dev) and the\ninterface link netns xi->net. They differ once the device is created in\nor moved to a netns other than the one the request runs in. The rtnl\nchangelink path checks CAP_NET_ADMIN only against dev_net(dev), so a\ncaller privileged there but not in xi->net can rewrite an interface that\nlives in xi->net.\n\nGate xfrmi_changelink() on rtnl_dev_link_net_capable() at its top,\nbefore any attribute is parsed."
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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:C/C:H/I:H/A:H",
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"baseScore": 8.8,
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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 - Exploitation requires a local RTM_NEWLINK changelink over an rtnetlink/netlink socket (rtnl_newlink → rtnl_changelink → xfrmi_changelink); this is a netlink configuration path, not remote packet handling, matching kernel Local guidance.\nAC:L - Once a cross-namespace xfrmi exists (dev_net(dev) ≠ xi->net via IFLA_LINK_NETNSID creation or netns migration), bypassing the missing check is one deterministic changelink with attacker-chosen IFLA_XFRM_IF_ID; no race, timing, or layout dependency.\nPR:L - rtnl_link_get_net_capable() only requires CAP_NET_ADMIN in dev_net(dev), obtainable by an unprivileged user via user+network namespaces (unshare -Urn / map-root-user); CAP_NET_ADMIN in the sticky link netns xi->net is not required.\nUI:N - The attack is fully programmatic from the attacker's own process through netlink; no victim action such as mounting a filesystem, opening a file, or clicking is required.\nS:C - Privilege is checked against dev_net(dev) while xfrmi_changelink/xfrmi_update mutate live xfrm interface state in xi->net (hash unlink/relink, if_id binding), crossing from the attacker's net/user namespace into another tenant's or the host network namespace.\nC:H - Changing IFLA_XFRM_IF_ID in xi->net retargets xfrmi_lookup/xfrm_lookup_with_ifid so host IPsec SAs can deliver decrypted VPN cleartext to the attacker-controlled netdev in dev_net(dev), exposing confidential tunneled traffic.\nI:H - Unauthorized changelink rewrites live xfrm interface parameters and xi->net registration, enabling redirection or injection of IPsec encapsulation/decapsulation paths on Internet-facing VPN gateways and cloud IPsec endpoints.\nA:H - xfrmi_update() runs synchronize_net() and netdev_state_change(); breaking or rebinding if_id mapping disrupts production IPsec/VTI/xfrmi VPN paths, causing sustained loss of encrypted tunnel connectivity."
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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/xfrm/xfrm_interface_core.c"
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],
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"versions": [
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{
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"version": "f203b76d78092faf248db3f851840fbecf80b40e",
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"lessThan": "04c1aa57d08471b1953bf27c84ac9b3d78d71831",
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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": "f203b76d78092faf248db3f851840fbecf80b40e",
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"lessThan": "bdfd1c21d90e628a58a9de79e024cdfcbedfa15c",
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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": "f203b76d78092faf248db3f851840fbecf80b40e",
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"lessThan": "80ec68bba11f7f387c0e4099c2d7b2c84943eb99",
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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": "f203b76d78092faf248db3f851840fbecf80b40e",
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"lessThan": "e9c90756f10da334fb31552e52c61f1dba69f491",
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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": "f203b76d78092faf248db3f851840fbecf80b40e",
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"lessThan": "37b61946d278c7deb0d40ba8f2b6fc0478d61dab",
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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": "f203b76d78092faf248db3f851840fbecf80b40e",
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"lessThan": "8ca2a19a987a7d1cb4c916ed9723a1c6993b4276",
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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": "f203b76d78092faf248db3f851840fbecf80b40e",
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"lessThan": "3ba2b2ef7d6a63b190f15cfc2b4ba0fba59928ea",
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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": "f203b76d78092faf248db3f851840fbecf80b40e",
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"lessThan": "095515d89b19b6cc19dfcdc846f97403ed1ebce3",
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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/xfrm/xfrm_interface_core.c"
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],
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"versions": [
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{
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"version": "4.19",
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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": "4.19",
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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": "5.10.261",
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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": "5.15.212",
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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": "6.1.178",
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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": "6.6.145",
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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": "6.12.97",
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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": "6.18.40",
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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": "7.1.5",
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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": "4.19",
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"versionEndExcluding": "5.10.261"
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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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"versionEndExcluding": "5.15.212"
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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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "6.12.97"
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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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"versionStartIncluding": "4.19",
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"versionEndExcluding": "7.1.5"
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},
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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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"references": [
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{
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"url": "https://git.kernel.org/stable/c/04c1aa57d08471b1953bf27c84ac9b3d78d71831"
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},
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{
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"url": "https://git.kernel.org/stable/c/bdfd1c21d90e628a58a9de79e024cdfcbedfa15c"
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},
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{
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"url": "https://git.kernel.org/stable/c/80ec68bba11f7f387c0e4099c2d7b2c84943eb99"
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},
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{
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"url": "https://git.kernel.org/stable/c/e9c90756f10da334fb31552e52c61f1dba69f491"
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},
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{
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"url": "https://git.kernel.org/stable/c/37b61946d278c7deb0d40ba8f2b6fc0478d61dab"
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},
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{
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"url": "https://git.kernel.org/stable/c/8ca2a19a987a7d1cb4c916ed9723a1c6993b4276"
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},
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{
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"url": "https://git.kernel.org/stable/c/3ba2b2ef7d6a63b190f15cfc2b4ba0fba59928ea"
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},
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{
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"url": "https://git.kernel.org/stable/c/095515d89b19b6cc19dfcdc846f97403ed1ebce3"
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}
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],
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"title": "xfrm: xfrm_interface: require CAP_NET_ADMIN in the device netns for changelink",
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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-2026-72136",
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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": "2026-10-16T18:42:42.776069Z"
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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": "2026-10-16T18:44:58.796Z"
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}
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}
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]
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}
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} |