net: mctp: ensure our nlmsg responses are initialised

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Summary

CVECVE-2026-45930
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-27 14:17:08 UTC
Updated2026-06-25 12:46:02 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.001800000 probability, percentile 0.077230000 (date 2026-06-24)

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 583be982d93479ea3d85091b0fd0b01201ede87d b37da3ac099e145bcd3be82c745a8d335772e3af git Not specified
CNA Linux Linux affected 583be982d93479ea3d85091b0fd0b01201ede87d c4f840437e7641764de15f2de951ac8335d641f1 git Not specified
CNA Linux Linux affected 583be982d93479ea3d85091b0fd0b01201ede87d 963537a26fd892f7e414a091f807b44aeee97a7d git Not specified
CNA Linux Linux affected 583be982d93479ea3d85091b0fd0b01201ede87d 976612471a9e6ead6ceffc241e4d0a1aac90b36a git Not specified
CNA Linux Linux affected 583be982d93479ea3d85091b0fd0b01201ede87d 54ed418de62a148a655262da682a050fa05f7924 git Not specified
CNA Linux Linux affected 583be982d93479ea3d85091b0fd0b01201ede87d 6fb6a97c86abb8592158088afaea0eb464cf9de1 git Not specified
CNA Linux Linux affected 583be982d93479ea3d85091b0fd0b01201ede87d a6a9bc544b675d8b5180f2718ec985ad267b5cbf git Not specified
CNA Linux Linux affected 5.15 Not specified
CNA Linux Linux unaffected 5.15 semver Not specified
CNA Linux Linux unaffected 5.15.210 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.176 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.143 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.93 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.35 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.4 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/b37da3ac099e145bcd3be82c745a8d335772e3af 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/54ed418de62a148a655262da682a050fa05f7924 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a6a9bc544b675d8b5180f2718ec985ad267b5cbf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c4f840437e7641764de15f2de951ac8335d641f1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/6fb6a97c86abb8592158088afaea0eb464cf9de1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/963537a26fd892f7e414a091f807b44aeee97a7d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/976612471a9e6ead6ceffc241e4d0a1aac90b36a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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