linux-kernel - Re: CVE-2024-49888: bpf: Fix a sdiv overflow issue

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Message-ID: <klr4llu43s4osw4o7234no33k6eujo2wvpeyhft2z5zgib6zac@hvg72k5q7w3f>
Date: Fri, 8 Nov 2024 13:29:43 +0800
From: Shung-Hsi Yu <shung-hsi.yu@...e.com>
To: cve@...nel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	linux-kernel@...r.kernel.org
Subject: Re: CVE-2024-49888: bpf: Fix a sdiv overflow issue

On Mon, Oct 21, 2024 at 08:01:36PM GMT, Greg Kroah-Hartman wrote:
> Description
> ===========
> 
> In the Linux kernel, the following vulnerability has been resolved:
> 
> bpf: Fix a sdiv overflow issue
> 
...
> 
> The Linux kernel CVE team has assigned CVE-2024-49888 to this issue.
> 
> Affected and fixed versions
> ===========================
> 
> 	Fixed in 6.10.14 with commit 4902a6a0dc59
> 	Fixed in 6.11.3 with commit d22e45a369af
> 	Fixed in 6.12-rc1 with commit 7dd34d7b7dcf

The issue is introduced with the addition of signed division
instruction, part of the BPF v4 instruction-set, in commit ec0e2da95f72
("bpf: Support new signed div/mod instructions.").

I'll send a patch adding the ".vulnerable" file to the vulns.git repo
for this CVE.

Best,
Shung-Hsi Yu