CVE-2026-31416
Netlink Header Size Miscalculation Causes Kernel WARN and Message Drop
Publication date: 2026-04-13
Last updated on: 2026-04-18
Assigner: kernel.org
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | * |
| linux_kernel | linux_kernel | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
AI Powered Q&A
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The vulnerability results in a WARN splat and drop of the netlink message, but other than this there are no ill effects.
There is no information provided about any impact on compliance with common standards and regulations such as GDPR or HIPAA.
Can you explain this vulnerability to me?
This vulnerability exists in the Linux kernel's netfilter component, specifically in nfnetlink_log. It relates to the handling of netlink messages where the NLMSG_DONE message did not properly account for the netlink header size, only considering the attribute size. This could cause a warning (WARN splat) and result in the netlink message being dropped.
How can this vulnerability impact me? :
The impact of this vulnerability is limited. It may cause a warning message and the dropping of netlink messages, but there are no other ill effects reported.