linux-kernel - Re: CVE-2023-52471: ice: Fix some null pointer dereference issues in ice

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Date: Mon, 26 Feb 2024 00:21:40 +0530
From: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
To: cve@...nel.org, linux-kernel@...r.kernel.org,
        linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Darren Kenny <darren.kenny@...cle.com>
Subject: Re: CVE-2023-52471: ice: Fix some null pointer dereference issues in
 ice_ptp.c

Hi Greg,

On 25/02/24 13:46, Greg Kroah-Hartman wrote:
> Description
> ===========
> 
> In the Linux kernel, the following vulnerability has been resolved:
> 
> ice: Fix some null pointer dereference issues in ice_ptp.c
> 
> devm_kasprintf() returns a pointer to dynamically allocated memory
> which can be NULL upon failure.
> 

I have a question about this and couple of other CVEs:

CVE-2023-52465: -- devm_kzalloc() and devm_kasprintf() failures
CVE-2023-52467: -- kasprintf() failure
CVE-2023-52471: -- devm_kasprintf() failure
CVE-2023-52472: -- allocation failure

As it's widely believed that small kmallocs cannot fail, is it worth 
having CVEs for the above bug fixes ?

Thanks,
Harshit

> The Linux kernel CVE team has assigned CVE-2023-52471 to this issue.
> 
> 
> Affected and fixed versions
> ===========================
> 
> 	Issue introduced in 6.7 with commit d938a8cca88a and fixed in 6.7.2 with commit 3cd9b9bee33f
> 	Issue introduced in 6.7 with commit d938a8cca88a and fixed in 6.8-rc1 with commit 3027e7b15b02
> 
> Please see https://www.kernel.org or a full list of currently supported
> kernel versions by the kernel community.
> 
> Unaffected versions might change over time as fixes are backported to
> older supported kernel versions.  The official CVE entry at
> 	https://cve.org/CVERecord/?id=CVE-2023-52471
> will be updated if fixes are backported, please check that for the most
> up to date information about this issue.
> 
> 
> Affected files
> ==============
> 
> The file(s) affected by this issue are:
> 	drivers/net/ethernet/intel/ice/ice_ptp.c
> 
> 
> Mitigation
> ==========
> 
> The Linux kernel CVE team recommends that you update to the latest
> stable kernel version for this, and many other bugfixes.  Individual
> changes are never tested alone, but rather are part of a larger kernel
> release.  Cherry-picking individual commits is not recommended or
> supported by the Linux kernel community at all.  If however, updating to
> the latest release is impossible, the individual changes to resolve this
> issue can be found at these commits:
> 	https://git.kernel.org/stable/c/3cd9b9bee33f39f6c6d52360fe381b89a7b12695
> 	https://git.kernel.org/stable/c/3027e7b15b02d2d37e3f82d6b8404f6d37e3b8cf
>