CVE-2026-45930 (GCVE-0-2026-45930)
Vulnerability from cvelistv5 – Published: 2026-05-27 12:17 – Updated: 2026-06-19 11:58
VLAI?
Title
net: mctp: ensure our nlmsg responses are initialised
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: mctp: ensure our nlmsg responses are initialised
Syed Faraz Abrar (@farazsth98) from Zellic, and Pumpkin (@u1f383) from
DEVCORE Research Team working with Trend Micro Zero Day Initiative
report that a RTM_GETNEIGH will return uninitalised data in the pad
bytes of the ndmsg data.
Ensure we're initialising the netlink data to zero, in the link, addr
and neigh response messages.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux |
Affected:
583be982d93479ea3d85091b0fd0b01201ede87d , < b37da3ac099e145bcd3be82c745a8d335772e3af
(git)
Affected: 583be982d93479ea3d85091b0fd0b01201ede87d , < c4f840437e7641764de15f2de951ac8335d641f1 (git) Affected: 583be982d93479ea3d85091b0fd0b01201ede87d , < 963537a26fd892f7e414a091f807b44aeee97a7d (git) Affected: 583be982d93479ea3d85091b0fd0b01201ede87d , < 976612471a9e6ead6ceffc241e4d0a1aac90b36a (git) Affected: 583be982d93479ea3d85091b0fd0b01201ede87d , < 54ed418de62a148a655262da682a050fa05f7924 (git) Affected: 583be982d93479ea3d85091b0fd0b01201ede87d , < 6fb6a97c86abb8592158088afaea0eb464cf9de1 (git) Affected: 583be982d93479ea3d85091b0fd0b01201ede87d , < a6a9bc544b675d8b5180f2718ec985ad267b5cbf (git) |
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{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/mctp/device.c",
"net/mctp/neigh.c",
"net/mctp/route.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"versionType": "git"
},
{
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{
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},
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}
]
},
{
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"product": "Linux",
"programFiles": [
"net/mctp/device.c",
"net/mctp/neigh.c",
"net/mctp/route.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.15"
},
{
"lessThan": "5.15",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.210",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.176",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.143",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.93",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.35",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.19.*",
"status": "unaffected",
"version": "6.19.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.210",
"versionStartIncluding": "5.15",
"vulnerable": true
},
{
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"versionEndExcluding": "6.1.176",
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},
{
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},
{
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},
{
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},
{
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mctp: ensure our nlmsg responses are initialised\n\nSyed Faraz Abrar (@farazsth98) from Zellic, and Pumpkin (@u1f383) from\nDEVCORE Research Team working with Trend Micro Zero Day Initiative\nreport that a RTM_GETNEIGH will return uninitalised data in the pad\nbytes of the ndmsg data.\n\nEnsure we\u0027re initialising the netlink data to zero, in the link, addr\nand neigh response messages."
}
],
"providerMetadata": {
"dateUpdated": "2026-06-19T11:58:46.478Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/b37da3ac099e145bcd3be82c745a8d335772e3af"
},
{
"url": "https://git.kernel.org/stable/c/c4f840437e7641764de15f2de951ac8335d641f1"
},
{
"url": "https://git.kernel.org/stable/c/963537a26fd892f7e414a091f807b44aeee97a7d"
},
{
"url": "https://git.kernel.org/stable/c/976612471a9e6ead6ceffc241e4d0a1aac90b36a"
},
{
"url": "https://git.kernel.org/stable/c/54ed418de62a148a655262da682a050fa05f7924"
},
{
"url": "https://git.kernel.org/stable/c/6fb6a97c86abb8592158088afaea0eb464cf9de1"
},
{
"url": "https://git.kernel.org/stable/c/a6a9bc544b675d8b5180f2718ec985ad267b5cbf"
}
],
"title": "net: mctp: ensure our nlmsg responses are initialised",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-45930",
"datePublished": "2026-05-27T12:17:48.689Z",
"dateReserved": "2026-05-13T15:03:33.086Z",
"dateUpdated": "2026-06-19T11:58:46.478Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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