Medium 5.5Published May 27, 2026

CVE-2026-45930net: mctp: ensure our nlmsg responses are initialised

Updated under an hour ago (Oct 26, 2026, 7:30 PM ET)

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Undergoing Analysis
Record last updated: Jun 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 583be982d93479ea3d85091b0fd0b01201ede87d before b37da3ac099e145bcd3be82c745a8d335772e3af; from 583be982d93479ea3d85091b0fd0b01201ede87d before c4f840437e7641764de15f2de951ac8335d641f1; from 583be982d93479ea3d85091b0fd0b01201ede87d before 963537a26fd892f7e414a091f807b44aeee97a7d; from 583be982d93479ea3d85091b0fd0b01201ede87d before 976612471a9e6ead6ceffc241e4d0a1aac90b36a; 583be982d93479ea3d85091b0fd0b01201ede87d builds before 54ed418de62a148a655262da682a050fa05f7924; 583be982d93479ea3d85091b0fd0b01201ede87d builds before 6fb6a97c86abb8592158088afaea0eb464cf9de1; from 583be982d93479ea3d85091b0fd0b01201ede87d before a6a9bc544b675d8b5180f2718ec985ad267b5cbf	CNA record
linux linux_kernel linux:linux_kernel	from 5.15 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.93; from 6.13 before 6.18.35; from 6.19 before 6.19.4	NVD

References

References

https://git.kernel.org/stable/c/b37da3ac099e145bcd3be82c745a8d335772e3af	patch
https://git.kernel.org/stable/c/c4f840437e7641764de15f2de951ac8335d641f1	patch
https://git.kernel.org/stable/c/963537a26fd892f7e414a091f807b44aeee97a7d	patch
https://git.kernel.org/stable/c/976612471a9e6ead6ceffc241e4d0a1aac90b36a	patch
https://git.kernel.org/stable/c/54ed418de62a148a655262da682a050fa05f7924	patch
https://git.kernel.org/stable/c/6fb6a97c86abb8592158088afaea0eb464cf9de1	patch
https://git.kernel.org/stable/c/a6a9bc544b675d8b5180f2718ec985ad267b5cbf	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.