netdev - Re: [PATCH net-next v7 00/10] ipv6: Address ext hdr DoS vulnerabilities

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20260205184512.306ec46b@kernel.org>
Date: Thu, 5 Feb 2026 18:45:12 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Tom Herbert <tom@...bertland.com>
Cc: davem@...emloft.net, netdev@...r.kernel.org, justin.iurman@...ege.be,
 willemdebruijn.kernel@...il.com, pabeni@...hat.com
Subject: Re: [PATCH net-next v7 00/10] ipv6: Address ext hdr DoS
 vulnerabilities

On Wed,  4 Feb 2026 14:51:44 -0800 Tom Herbert wrote:
> IPv6 extension headers are defined to be quite open ended with few
> limits. For instance, RFC8200 requires a receiver to process any
> number of extension headers in a packet in any order. This flexibility
> comes at the cost of a potential Denial of Service attack. The only
> thing that might mitigate the DoS attacks is the fact that packets
> with extension headers experience high drop rates on the Internet so
> that a DoS attack based on extension wouldn't be very effective at
> Internet scale.

Patch 10 never arrived..