317 lines
16 KiB
JSON
317 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-2025-37998",
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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": "2025-04-16T04:51:23.976Z",
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"datePublished": "2025-05-29T13:15:56.197Z",
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"dateUpdated": "2026-10-15T21:52:05.968Z"
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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": "2026-08-05T11:58:50.276Z"
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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\nopenvswitch: Fix unsafe attribute parsing in output_userspace()\n\nThis patch replaces the manual Netlink attribute iteration in\noutput_userspace() with nla_for_each_nested(), which ensures that only\nwell-formed attributes are processed."
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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 malformed action must be installed through the openvswitch generic-netlink interface (OVS_PACKET_CMD_EXECUTE or OVS_FLOW_CMD_NEW), which requires a local netlink socket. A remote peer's packets cannot introduce malformed attributes, since the datapath's action list is written only by local userspace.\nAC:L - Exploitation is fully deterministic — the attacker crafts a nested attribute with nla_len of 0, 1-3, or 0xFFFF and executes it; there is no race and no dependence on memory layout to trigger the loop or the OOB copy. Liberal netlink validation accepts the malformed trailer unconditionally.\nPR:L - The OVS genl ops use GENL_UNS_ADMIN_PERM with .netnsok = true, i.e. netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN), so an ordinary unprivileged user obtains the needed capability via `unshare -Urn` and creates their own datapath. No real root in the init namespace is required.\nUI:N - The attacker installs the action and triggers execution entirely from their own process via netlink; no victim action or cooperating process is involved.\nS:U - The corruption and disclosure are confined to the kernel that the attacker is already interacting with — standard local kernel compromise with no crossing into a hypervisor, IOMMU, or other security authority.\nC:H - A USERDATA attribute with nla_len 0xFFFF makes queue_userspace_packet() copy ~64KB from beyond the ≤32KB sw_flow_actions allocation directly into the upcall netlink message sent to the attacker's own socket, yielding a repeatable arbitrary-offset kernel heap read that defeats KASLR and leaks adjacent object contents.\nI:H - A USERDATA attribute with nla_len of 1-3 makes nla_len() negative, and queue_userspace_packet() uses __nla_put() with no tailroom check, so memcpy() is invoked with a size_t of ~2^64 — an unbounded out-of-bounds write past the skb constituting severe heap memory corruption.\nA:H - An attribute with nla_len == 0 makes NLA_ALIGN(0) == 0, so nla_next() neither advances the pointer nor decrements rem, hanging the CPU in an infinite loop inside the packet-processing path with RCU read lock held; the wild memcpy and OOB read paths additionally produce immediate oops/panic."
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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/actions.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": "6712dc21506738f5f22b4f68b7c0d9e0df819dbd",
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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": "06b4f110c79716c181a8c5da007c259807840232",
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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": "47f7f00cf2fa3137d5c0416ef1a71bdf77901395",
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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": "bca8df998cce1fead8cbc69144862eadc2e34c87",
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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": "0236742bd959332181c1fcc41a05b7b709180501",
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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": "ec334aaab74705cc515205e1da3cb369fdfd93cd",
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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": "4fa672cbce9c86c3efb8621df1ae580d47813430",
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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": "6beb6835c1fbb3f676aebb51a5fee6b77fed9308",
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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/actions.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": "5.4.294",
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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": "5.10.238",
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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": "5.15.183",
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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": "6.1.139",
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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": "6.6.91",
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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": "6.12.29",
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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": "6.14.7",
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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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"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": "5.4.294"
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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": "5.10.238"
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"url": "https://git.kernel.org/stable/c/6712dc21506738f5f22b4f68b7c0d9e0df819dbd"
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"url": "https://git.kernel.org/stable/c/06b4f110c79716c181a8c5da007c259807840232"
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},
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{
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"url": "https://git.kernel.org/stable/c/47f7f00cf2fa3137d5c0416ef1a71bdf77901395"
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},
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{
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"url": "https://git.kernel.org/stable/c/bca8df998cce1fead8cbc69144862eadc2e34c87"
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},
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{
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"url": "https://git.kernel.org/stable/c/0236742bd959332181c1fcc41a05b7b709180501"
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},
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{
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"url": "https://git.kernel.org/stable/c/ec334aaab74705cc515205e1da3cb369fdfd93cd"
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},
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{
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"url": "https://git.kernel.org/stable/c/4fa672cbce9c86c3efb8621df1ae580d47813430"
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},
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{
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"url": "https://git.kernel.org/stable/c/6beb6835c1fbb3f676aebb51a5fee6b77fed9308"
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},
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{
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"url": "https://www.zerodayinitiative.com/advisories/ZDI-25-307/"
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}
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],
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"title": "openvswitch: Fix unsafe attribute parsing in output_userspace()",
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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/2025/10/msg00007.html"
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},
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html"
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}
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"dateUpdated": "2025-11-03T19:58:12.202Z"
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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-2025-37998",
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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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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-15T21:46:40.143387Z"
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"dateUpdated": "2026-10-15T21:52:05.968Z"
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}
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}
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]
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}
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} |