linux-kernel - Re: CVE-2025-39898: e1000e: fix heap overflow in e1000_set

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Message-ID: <db92fcc8-114d-4e85-9d15-7860545bc65e@suse.de>
Date: Fri, 24 Oct 2025 12:53:44 +0200
From: Steffen Jaeckel <sjaeckel@...e.de>
To: cve@...nel.org, linux-kernel@...r.kernel.org,
 linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>, anthony.l.nguyen@...el.com,
 Vitaly Lifshits <vitaly.lifshits@...el.com>, dima.ruinskiy@...el.com,
 Mikael Wessel <post@...aelkw.online>,
 Mor Bar-Gabay <morx.bar.gabay@...el.com>, davem@...emloft.net,
 kuba@...nel.org, pabeni@...hat.com, edumazet@...gle.com,
 andrew+netdev@...n.ch
Subject: Re: CVE-2025-39898: e1000e: fix heap overflow in e1000_set_eeprom

Hi Greg,

On 2025-10-01 09:43, Greg Kroah-Hartman wrote:
> From: Greg Kroah-Hartman <gregkh@...nel.org>
> 
> Description
> ===========
> 
> In the Linux kernel, the following vulnerability has been resolved:
> 
> e1000e: fix heap overflow in e1000_set_eeprom
> 
> Fix a possible heap overflow in e1000_set_eeprom function by adding
> input validation for the requested length of the change in the EEPROM.
> In addition, change the variable type from int to size_t for better
> code practices and rearrange declarations to RCT.
> 
> The Linux kernel CVE team has assigned CVE-2025-39898 to this issue.
> 
> 
> Affected and fixed versions
> ===========================
> 
> 	Issue introduced in 2.6.24 with commit bc7f75fa97884d41efbfde1397b621fefb2550b4 and fixed in 5.4.299 with commit ea832ec0583e2398ea0c5ed8d902c923e16f53c4
> 	Issue introduced in 2.6.24 with commit bc7f75fa97884d41efbfde1397b621fefb2550b4 and fixed in 5.10.243 with commit ce8829d3d44b8622741bccca9f4408bc3da30b2b
> 	Issue introduced in 2.6.24 with commit bc7f75fa97884d41efbfde1397b621fefb2550b4 and fixed in 5.15.192 with commit 99a8772611e2d7ec318be7f0f072037914a1f509
> 	Issue introduced in 2.6.24 with commit bc7f75fa97884d41efbfde1397b621fefb2550b4 and fixed in 6.1.151 with commit b48adcacc34fbbc49046a7ee8a97839bef369c85
> 	Issue introduced in 2.6.24 with commit bc7f75fa97884d41efbfde1397b621fefb2550b4 and fixed in 6.6.105 with commit 50a84d5c814039ad2abe2748aec3e89324a548a7
> 	Issue introduced in 2.6.24 with commit bc7f75fa97884d41efbfde1397b621fefb2550b4 and fixed in 6.12.46 with commit b370f7b1f470a8d5485cc1e40e8ff663bb55d712
> 	Issue introduced in 2.6.24 with commit bc7f75fa97884d41efbfde1397b621fefb2550b4 and fixed in 6.16.6 with commit 0aec3211283482cfcdd606d1345e1f9acbcabd31
> 	Issue introduced in 2.6.24 with commit bc7f75fa97884d41efbfde1397b621fefb2550b4 and fixed in 6.17 with commit 90fb7db49c6dbac961c6b8ebfd741141ffbc8545
> 
> [...]

we believe that this CVE is invalid since the sole caller is 
`net/ethtool/ioctl.c:ethtool_set_eeprom()`, which already does all the 
necessary checks before invoking a driver specific implementation.


Cheers
Steffen
-- 
Steffen Jaeckel                       Kernel Network Engineer
sjaeckel@...e.de
SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg
HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich