Bug 2024989 (CVE-2021-43975)

Summary:	CVE-2021-43975 kernel: out-of-bounds write in hw_atl_utils_fw_rpc_wait() in drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, adscvr, airlied, alciregi, allarkin, bdettelb, bhu, blc, bskeggs, chwhite, dbohanno, debarbos, dvlasenk, ezulian, hdegoede, hkrzesin, jarod, jarodwilson, jburrell, jdenham, jeremy, jfaracco, jforbes, jglisse, jlelli, joe.lawrence, jonathan, josef, jshortt, jstancek, jwboyer, jwyatt, kcarcia, kernel-maint, kernel-mgr, ldoskova, lgoncalv, linville, lleshchi, lzampier, masami256, mchehab, mlangsdo, nmurray, ptalbert, qzhao, rrobaina, rvrbovsk, rysulliv, scweaver, steved, swood, tyberry, vkumar, walters, wcosta, williams, wmealing, ycote
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	Linux kernel 5.16-rc2	Doc Type:	If docs needed, set a value
Doc Text:	An out-of-bounds write flaw was found in the Linux kernel’s Aquantia AQtion Ethernet card Atlantic driver in the way the ethernet card provides malicious input to the driver. This flaw allows a local user to emulate the networking device and crash the system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2025706, 2025707, 2025708, 2208283, 2024990, 2027742
Bug Blocks:	2024991

Description Guilherme de Almeida Suckevicz 2021-11-19 16:39:30 UTC

In the Linux kernel through 5.15.2, hw_atl_utils_fw_rpc_wait in drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c allows an attacker (who can introduce a crafted device) to trigger an out-of-bounds write via a crafted length value.

Reference and upstream patches:
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=b922f622592af76b57cbc566eaeccda0b31a3496
https://lore.kernel.org/netdev/163698540868.13805.17800408021782408762.git-patchwork-notify@kernel.org/T/

Comment 1 Guilherme de Almeida Suckevicz 2021-11-19 16:41:01 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2024990]