CVE-2026-45930

net: mctp: ensure our nlmsg responses are initialised

MEDIUM

5.5

CVSS Score

Published: May 27, 2026 at 12:17 PM UTC

Updated: June 27, 2026 at 11:41 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.1%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

5.15 ≤ v < 5.15.2105.15 ≤ v < 6.1.1765.15 ≤ v < 6.12.935.15 ≤ v < 6.18.355.15 ≤ v < 6.19.45.15 ≤ v < 6.6.1435.15 ≤ v < 7.05.16 ≤ v < 6.1.1766.13 ≤ v < 6.18.356.19 ≤ v < 6.19.46.2 ≤ v < 6.6.1436.7 ≤ v < 6.12.935.15583be982d93479ea3d85091b0fd0b01201ede87d

Vendor states this is fixed in 54ed418de62a148a655262da682a050fa05f7924 (fixed)

Vendor states this is fixed in 6fb6a97c86abb8592158088afaea0eb464cf9de1 (fixed)

Vendor states this is fixed in 963537a26fd892f7e414a091f807b44aeee97a7d (fixed)

Vendor states this is fixed in 976612471a9e6ead6ceffc241e4d0a1aac90b36a (fixed)

Vendor states this is fixed in a6a9bc544b675d8b5180f2718ec985ad267b5cbf (fixed)

Vendor states this is fixed in b37da3ac099e145bcd3be82c745a8d335772e3af (fixed)

Vendor states this is fixed in c4f840437e7641764de15f2de951ac8335d641f1 (fixed)

Vendor states this is fixed in 5.15 (unaffected)

Vendor states this is fixed in 5.15.210 (unaffected)

Vendor states this is fixed in 6.1.176 (unaffected)

Vendor states this is fixed in 6.12.93 (unaffected)

Vendor states this is fixed in 6.18.35 (unaffected)