5.5
MEDIUM
CVSS 3.1
CVE-2026-45930
net: mctp: ensure our nlmsg responses are initialised
Overview
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.
Details
INFO
Published Date :
May 27, 2026, 2:17 p.m.
Last Modified :
June 25, 2026, 12:46 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
Initialize netlink data in response messages to prevent uninitialized data exposure.
- Initialize netlink data in link response messages.
- Initialize netlink data in address response messages.
- Initialize netlink data in neighbor response messages.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-45930.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45930 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-45930
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-45930 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-45930 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jun. 25, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 6.19.4 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.15 up to (excluding) 5.15.210 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.176 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.35 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.143 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.93 Added Reference Type kernel.org: https://git.kernel.org/stable/c/54ed418de62a148a655262da682a050fa05f7924 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/6fb6a97c86abb8592158088afaea0eb464cf9de1 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/963537a26fd892f7e414a091f807b44aeee97a7d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/976612471a9e6ead6ceffc241e4d0a1aac90b36a Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/a6a9bc544b675d8b5180f2718ec985ad267b5cbf Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/b37da3ac099e145bcd3be82c745a8d335772e3af Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/c4f840437e7641764de15f2de951ac8335d641f1 Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 19, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/963537a26fd892f7e414a091f807b44aeee97a7d Added Reference https://git.kernel.org/stable/c/b37da3ac099e145bcd3be82c745a8d335772e3af Added Reference https://git.kernel.org/stable/c/c4f840437e7641764de15f2de951ac8335d641f1 Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '583be982d93479ea3d85091b0fd0b01201ede87d', 'lessThan': '976612471a9e6ead6ceffc241e4d0a1aac90b36a', 'versionType': 'git'}, {'status': 'affected', 'version': '583be982d93479ea3d85091b0fd0b01201ede87d', 'lessThan': '54ed418de62a148a655262da682a050fa05f7924', 'versionType': 'git'}, {'status': 'affected', 'version': '583be982d93479ea3d85091b0fd0b01201ede87d', 'lessThan': '6fb6a97c86abb8592158088afaea0eb464cf9de1', 'versionType': 'git'}, {'status': 'affected', 'version': '583be982d93479ea3d85091b0fd0b01201ede87d', 'lessThan': 'a6a9bc544b675d8b5180f2718ec985ad267b5cbf', 'versionType': 'git'}], 'programFiles': ['net/mctp/device.c', 'net/mctp/neigh.c', 'net/mctp/route.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.15', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.93', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.35', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '6.19.4', 'versionType': 'semver', 'lessThanOrEqual': '6.19.*'}, {'status': 'unaffected', 'version': '7.0', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/mctp/device.c', 'net/mctp/neigh.c', 'net/mctp/route.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '583be982d93479ea3d85091b0fd0b01201ede87d', 'lessThan': 'b37da3ac099e145bcd3be82c745a8d335772e3af', 'versionType': 'git'}, {'status': 'affected', 'version': '583be982d93479ea3d85091b0fd0b01201ede87d', 'lessThan': 'c4f840437e7641764de15f2de951ac8335d641f1', 'versionType': 'git'}, {'status': 'affected', 'version': '583be982d93479ea3d85091b0fd0b01201ede87d', 'lessThan': '963537a26fd892f7e414a091f807b44aeee97a7d', 'versionType': 'git'}, {'status': 'affected', 'version': '583be982d93479ea3d85091b0fd0b01201ede87d', 'lessThan': '976612471a9e6ead6ceffc241e4d0a1aac90b36a', 'versionType': 'git'}, {'status': 'affected', 'version': '583be982d93479ea3d85091b0fd0b01201ede87d', 'lessThan': '54ed418de62a148a655262da682a050fa05f7924', 'versionType': 'git'}, {'status': 'affected', 'version': '583be982d93479ea3d85091b0fd0b01201ede87d', 'lessThan': '6fb6a97c86abb8592158088afaea0eb464cf9de1', 'versionType': 'git'}, {'status': 'affected', 'version': '583be982d93479ea3d85091b0fd0b01201ede87d', 'lessThan': 'a6a9bc544b675d8b5180f2718ec985ad267b5cbf', 'versionType': 'git'}], 'programFiles': ['net/mctp/device.c', 'net/mctp/neigh.c', 'net/mctp/route.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.15', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.210', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.176', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.143', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.93', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.35', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '6.19.4', 'versionType': 'semver', 'lessThanOrEqual': '6.19.*'}, {'status': 'unaffected', 'version': '7.0', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/mctp/device.c', 'net/mctp/neigh.c', 'net/mctp/route.c'], 'defaultStatus': 'affected'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '583be982d93479ea3d85091b0fd0b01201ede87d', 'lessThan': '976612471a9e6ead6ceffc241e4d0a1aac90b36a', 'versionType': 'git'}, {'status': 'affected', 'version': '583be982d93479ea3d85091b0fd0b01201ede87d', 'lessThan': '54ed418de62a148a655262da682a050fa05f7924', 'versionType': 'git'}, {'status': 'affected', 'version': '583be982d93479ea3d85091b0fd0b01201ede87d', 'lessThan': '6fb6a97c86abb8592158088afaea0eb464cf9de1', 'versionType': 'git'}, {'status': 'affected', 'version': '583be982d93479ea3d85091b0fd0b01201ede87d', 'lessThan': 'a6a9bc544b675d8b5180f2718ec985ad267b5cbf', 'versionType': 'git'}], 'programFiles': ['net/mctp/device.c', 'net/mctp/neigh.c', 'net/mctp/route.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.15', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.93', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.35', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '6.19.4', 'versionType': 'semver', 'lessThanOrEqual': '6.19.*'}, {'status': 'unaffected', 'version': '7.0', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/mctp/device.c', 'net/mctp/neigh.c', 'net/mctp/route.c'], 'defaultStatus': 'affected'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 09, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/54ed418de62a148a655262da682a050fa05f7924 Added Reference https://git.kernel.org/stable/c/976612471a9e6ead6ceffc241e4d0a1aac90b36a -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 27, 2026
Action Type Old Value New Value Added 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. Added Reference https://git.kernel.org/stable/c/6fb6a97c86abb8592158088afaea0eb464cf9de1 Added Reference https://git.kernel.org/stable/c/a6a9bc544b675d8b5180f2718ec985ad267b5cbf
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.