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-2025-37789",
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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": "2025-04-16T04:51:23.940Z",
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"datePublished": "2025-05-01T13:07:22.809Z",
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"dateUpdated": "2026-08-05T11:57:32.820Z"
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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": "2026-08-05T11:57:32.820Z"
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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\nnet: openvswitch: fix nested key length validation in the set() action\n\nIt's not safe to access nla_len(ovs_key) if the data is smaller than\nthe netlink header. Check that the attribute is OK first."
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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 vulnerability is reached only through a crafted generic-netlink message (OVS_FLOW_CMD_NEW / OVS_PACKET_CMD_EXECUTE) sent on an AF_NETLINK socket by a local process. There is no remote or adjacent-network path into openvswitch flow-action validation.\nAC:L - Triggering requires only a single well-formed netlink message containing an OVS_ACTION_ATTR_SET whose inner nlattr declares nla_len of 1-3; there is no race, no timing window, and no dependence on memory layout the attacker cannot influence. The negative-length path is fully in-bounds and deterministic, and the actions are validated before the datapath lookup so not even a datapath must exist.\nPR:L - The OVS flow genl ops use GENL_UNS_ADMIN_PERM with .netnsok = true, so the CAP_NET_ADMIN check is scoped to the netns's owning user namespace and any unprivileged user can satisfy it with `unshare -Urn`. The openvswitch module is autoloaded from an unprivileged CTRL_CMD_GETFAMILY lookup via MODULE_ALIAS_GENL_FAMILY.\nUI:N - The attacker performs the entire sequence themselves via socket()/sendmsg(); no action by any other user or administrator is needed.\nS:U - The corruption is confined to kernel memory under the same security authority as the attacking process; no VM, IOMMU, or hypervisor boundary is crossed.\nC:H - The bug produces out-of-bounds reads beyond the netlink skb — the KMSAN-confirmed header read, the unbounded forward scan in validate_masked() with a negative length, and a memcpy whose source is read for up to SIZE_MAX bytes. Data copied out of bounds lands in the flow's actions buffer, which is echoed back to userspace by OVS_FLOW_CMD_GET/DUMP, giving an arbitrary kernel-memory disclosure primitive.\nI:H - With key_len underflowing to (size_t)-1, `memcpy(nla_data(at), nla_data(ovs_key), key_len)` and the following `memset(..., 0xff, key_len)` perform an effectively unbounded out-of-bounds write over the kernel heap using attacker-influenced data. An out-of-bounds write of this scope is a full integrity compromise.\nA:H - The wild memcpy/memset will fault as soon as it walks off mapped memory, and the negative-length validate_masked() loop scans up to 4G of memory; either way the result is a kernel panic, and on sanitizer builds it is an immediate KASAN/KMSAN report. The crash is reachable repeatedly by an unprivileged local user."
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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/openvswitch/flow_netlink.c"
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],
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"versions": [
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{
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"version": "ccb1352e76cff0524e7ccb2074826a092dd13016",
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"lessThan": "54c6957d1123a2032099b9eab51c314800f677ce",
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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": "ccb1352e76cff0524e7ccb2074826a092dd13016",
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"lessThan": "7fcaec0b2ab8fa5fbf0b45e5512364a168f445bd",
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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": "ccb1352e76cff0524e7ccb2074826a092dd13016",
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"lessThan": "a27526e6b48eee9e2d82efff502c4f272f1a91d4",
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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": "ccb1352e76cff0524e7ccb2074826a092dd13016",
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"lessThan": "1489c195c8eecd262aa6712761ba5288203e28ec",
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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": "ccb1352e76cff0524e7ccb2074826a092dd13016",
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"lessThan": "824a7c2df5127b2402b68a21a265d413e78dcad7",
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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": "ccb1352e76cff0524e7ccb2074826a092dd13016",
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"lessThan": "be80768d4f3b6fd13f421451cc3fee8778aba8bc",
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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": "ccb1352e76cff0524e7ccb2074826a092dd13016",
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"lessThan": "03d7262dd53e8c404da35cc81aaa887fd901f76b",
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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": "ccb1352e76cff0524e7ccb2074826a092dd13016",
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"lessThan": "65d91192aa66f05710cfddf6a14b5a25ee554dba",
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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/openvswitch/flow_netlink.c"
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],
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"versions": [
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{
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"version": "3.3",
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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": "3.3",
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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": "5.4.293",
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"lessThanOrEqual": "5.4.*",
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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": "5.10.237",
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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": "5.15.181",
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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": "6.1.135",
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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": "6.6.88",
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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": "6.12.25",
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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": "6.14.4",
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"lessThanOrEqual": "6.14.*",
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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": "6.15",
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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": "3.3",
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"versionEndExcluding": "5.4.293"
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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": "3.3",
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"versionEndExcluding": "5.10.237"
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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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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/54c6957d1123a2032099b9eab51c314800f677ce"
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},
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{
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"url": "https://git.kernel.org/stable/c/7fcaec0b2ab8fa5fbf0b45e5512364a168f445bd"
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},
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{
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"url": "https://git.kernel.org/stable/c/a27526e6b48eee9e2d82efff502c4f272f1a91d4"
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},
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{
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"url": "https://git.kernel.org/stable/c/1489c195c8eecd262aa6712761ba5288203e28ec"
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},
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{
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"url": "https://git.kernel.org/stable/c/824a7c2df5127b2402b68a21a265d413e78dcad7"
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},
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{
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"url": "https://git.kernel.org/stable/c/be80768d4f3b6fd13f421451cc3fee8778aba8bc"
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},
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{
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"url": "https://git.kernel.org/stable/c/03d7262dd53e8c404da35cc81aaa887fd901f76b"
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},
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{
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"url": "https://git.kernel.org/stable/c/65d91192aa66f05710cfddf6a14b5a25ee554dba"
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}
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],
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"title": "net: openvswitch: fix nested key length validation in the set() action",
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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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"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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"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.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": "2025-11-03T19:55:14.808Z"
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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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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2025-37789",
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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": "2026-06-10T20:41:41.618677Z"
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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": "2026-06-11T18:44:15.185Z"
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}
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}
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]
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}
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} |