linux-kernel - Re: [PATCH net v2] batman-adv: fix OOB read/write in network-coding decode

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 for Android: free password hash cracker in your pocket

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

Message-ID: <175665260151.58639.6084959400627208281.b4-ty@narfation.org>
Date: Sun, 31 Aug 2025 17:06:38 +0200
From: Sven Eckelmann <sven@...fation.org>
To: netdev@...r.kernel.org,
	Stanislav Fort <stanislav.fort@...le.com>
Cc: Sven Eckelmann <sven@...fation.org>,
	Marek Lindner <marek.lindner@...lbox.org>,
	Simon Wunderlich <sw@...onwunderlich.de>,
	Antonio Quartulli <antonio@...delbit.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>,
	b.a.t.m.a.n@...ts.open-mesh.org,
	linux-kernel@...r.kernel.org,
	disclosure@...le.com,
	stable@...r.kernel.org
Subject: Re: [PATCH net v2] batman-adv: fix OOB read/write in network-coding decode


On Sun, 31 Aug 2025 16:56:23 +0200, Stanislav Fort wrote:
> batadv_nc_skb_decode_packet() trusts coded_len and checks only against
> skb->len. XOR starts at sizeof(struct batadv_unicast_packet), reducing
> payload headroom, and the source skb length is not verified, allowing an
> out-of-bounds read and a small out-of-bounds write.
> 
> Validate that coded_len fits within the payload area of both destination
> and source sk_buffs before XORing.
> 
> [...]

Applied, thanks!

[1/1] batman-adv: fix OOB read/write in network-coding decode
      https://git.open-mesh.org/linux-merge.git/commit/?h=batadv/net&id=d77b6ff0ce35a6d0b0b7b9581bc3f76d041d4087

Best regards,
-- 
Sven Eckelmann <sven@...fation.org>