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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-43329 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: strictly check for maximum number of actions The maximum number of flowtable hardware offload actions in IPv6 is: * ethernet mangling (4 payload actions, 2 for each ethernet address) * SNAT (4 payload actions) * DNAT (4 payload actions) * Double VLAN (4 vlan actions, 2 for popping vlan, and 2 for pushing) for QinQ. * Redirect (1 action) Which makes 17, while the maximum is 16. But act_ct supports for tunnels actions too. Note that payload action operates at 32-bit word level, so mangling an IPv6 address takes 4 payload actions. Update flow_action_entry_next() calls to check for the maximum number of supported actions. While at it, rise the maximum number of actions per flow from 16 to 24 so this works fine with IPv6 setups.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/504c9456699dcf4d15195ef34a0fa94a80bfc877 kernel.org
https://git.kernel.org/stable/c/5382bb03e9c33b089d60788478b922a2dca284cc kernel.org
https://git.kernel.org/stable/c/57c78bd2e2dd08897acd35b2bf8bcef322e36f5e kernel.org
https://git.kernel.org/stable/c/76522fcdbc3a02b568f5d957f7e66fc194abb893 kernel.org
https://git.kernel.org/stable/c/879959a7a2be814dd57568655eafa3d8f4d0309e kernel.org
https://git.kernel.org/stable/c/ead66c77303f760f6c30be96e2e20d5a77cef614 kernel.org
https://git.kernel.org/stable/c/fe9018d3e94329f1951b00805a8640bc06f56ead kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-43329
NVD Published Date:
05/08/2026
NVD Last Modified:
05/08/2026
Source:
kernel.org