268 lines
15 KiB
JSON
268 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-2026-31502",
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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": "2026-03-09T15:48:24.104Z",
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"datePublished": "2026-04-22T13:54:22.481Z",
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"dateUpdated": "2026-10-30T12:24:17.203Z"
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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": "2026-10-30T12:24:17.203Z"
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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\nteam: fix header_ops type confusion with non-Ethernet ports\n\nSimilar to commit 950803f72547 (\"bonding: fix type confusion in\nbond_setup_by_slave()\") team has the same class of header_ops type\nconfusion.\n\nFor non-Ethernet ports, team_setup_by_port() copies port_dev->header_ops\ndirectly. When the team device later calls dev_hard_header() or\ndev_parse_header(), these callbacks can run with the team net_device\ninstead of the real lower device, so netdev_priv(dev) is interpreted as\nthe wrong private type and can crash.\n\nThe syzbot report shows a crash in bond_header_create(), but the root\ncause is in team: the topology is gre -> bond -> team, and team calls\nthe inherited header_ops with its own net_device instead of the lower\ndevice, so bond_header_create() receives a team device and interprets\nnetdev_priv() as bonding private data, causing a type confusion crash.\n\nFix this by introducing team header_ops wrappers for create/parse,\nselecting a team port under RCU, and calling the lower device callbacks\nwith port->dev, so each callback always sees the correct net_device\ncontext.\n\nAlso pass the selected lower device to the lower parse callback, so\nrecursion is bounded in stacked non-Ethernet topologies and parse\ncallbacks always run with the correct device context."
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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 - An attacker reaches the vulnerable team header_ops path by locally creating/enslaving network devices through rtnetlink and then triggering dev_hard_header()/dev_parse_header() via local packet/socket or network-stack activity on the malformed team device. The required setup is a local kernel networking configuration path rather than an unauthenticated packet-processing path.\nAC:L - The vulnerable topology, such as GRE -> bond -> team, is fully attacker-controlled once the required namespace capabilities are available, and triggering the bad callback is deterministic. There is no race or external timing condition required.\nPR:L - Creating team/bond/GRE devices and enslaving them requires CAP_NET_ADMIN, and packet sockets require CAP_NET_RAW, but both are available to an unprivileged user inside a user and network namespace on systems permitting unprivileged user namespaces. This is therefore low privileges, not real init-namespace root.\nUI:N - No victim interaction is required after the attacker has local access and namespace capabilities. The attacker can configure the devices and trigger the callback directly.\nS:U - The impact is within the same kernel security authority. This is a kernel crash/type-confusion or privilege-impact issue, not a VM escape or cross-scope boundary violation.\nC:H - The bug is a header_ops type confusion where callbacks interpret team private data as another subsystem's private structure, causing attacker-influenced kernel pointer dereferences and potential kernel memory exposure. Following the higher-severity rule for type confusion, confidentiality impact is high.\nI:H - Type confusion in kernel callback dispatch can lead to misinterpreted object pointers and potentially control-flow or write-primitive exploitation beyond the observed crash. Kernel type confusion is scored as high integrity impact.\nA:H - The reported and expected failure mode is a kernel oops/BUG/crash when the inherited callback uses the wrong net_device private layout. This gives high availability impact."
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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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"drivers/net/team/team_core.c"
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],
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"versions": [
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{
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"version": "1d76efe1577b4323609b1bcbfafa8b731eda071a",
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"lessThan": "c6e255b0ce30cdea37e34d6d87e2212eb8c7f7a4",
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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": "1d76efe1577b4323609b1bcbfafa8b731eda071a",
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"lessThan": "420e5aad7ba89e8f79e2dc8327b0c0c24c1c1d53",
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"status": "affected",
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},
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{
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"status": "affected",
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{
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"version": "1d76efe1577b4323609b1bcbfafa8b731eda071a",
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"lessThan": "0a7468ed49a6b65d34abcc6eb60e15f7f6d34da0",
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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": "1d76efe1577b4323609b1bcbfafa8b731eda071a",
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"lessThan": "20491d384d973a63fbdaf7a71e38d69b0659ea55",
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"status": "affected",
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"versionType": "git"
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{
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"version": "1d76efe1577b4323609b1bcbfafa8b731eda071a",
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"lessThan": "425000dbf17373a4ab8be9428f5dc055ef870a56",
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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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"drivers/net/team/team_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": "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": "6.6.145",
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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": "6.12.80",
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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": "6.18.21",
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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": "6.19.11",
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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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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.7",
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"versionEndExcluding": "6.1.191"
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/c6e255b0ce30cdea37e34d6d87e2212eb8c7f7a4"
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},
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{
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"url": "https://git.kernel.org/stable/c/420e5aad7ba89e8f79e2dc8327b0c0c24c1c1d53"
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"url": "https://git.kernel.org/stable/c/6d3161fa3eee64d46b766fb0db33ec7f300ef52d"
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"url": "https://git.kernel.org/stable/c/0a7468ed49a6b65d34abcc6eb60e15f7f6d34da0"
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"url": "https://git.kernel.org/stable/c/20491d384d973a63fbdaf7a71e38d69b0659ea55"
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},
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{
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"url": "https://git.kernel.org/stable/c/425000dbf17373a4ab8be9428f5dc055ef870a56"
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}
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],
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"title": "team: fix header_ops type confusion with non-Ethernet ports",
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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-2026-31502",
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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": "2026-10-16T15:10:14.938095Z"
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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-843",
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"description": "CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')"
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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": "2026-10-19T18:45:53.793Z"
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}
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}
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]
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}
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} |