Bug 2457825 (CVE-2026-31416) - CVE-2026-31416 kernel: Linux kernel: Netfilter Denial of Service due to netlink header size miscalculation
Summary: CVE-2026-31416 kernel: Linux kernel: Netfilter Denial of Service due to netli...
Keywords:
Status: NEW
Alias: CVE-2026-31416
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-13 14:01 UTC by OSIDB Bzimport
Modified: 2026-04-15 12:50 UTC (History)
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Description OSIDB Bzimport 2026-04-13 14:01:33 UTC 
In the Linux kernel, the following vulnerability has been resolved:

netfilter: nfnetlink_log: account for netlink header size

This is a followup to an old bug fix: NLMSG_DONE needs to account
for the netlink header size, not just the attribute size.

This can result in a WARN splat + drop of the netlink message,
but other than this there are no ill effects.
Comment 1 Alexander B 2026-04-14 10:36:01 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026041310-CVE-2026-31416-9c4a@gregkh/T
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