Bug 1834821 (CVE-2020-12769)

Summary:	CVE-2020-12769 kernel: DoS via concurrent calls to dw_spi_irq and dw_spi_transfer_one functions in drivers/spi/spi-dw.c
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	acaringi, airlied, bhu, blc, bmasney, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jlelli, john.j5live, jonathan, josef, jross, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, mcressma, mjg59, mlangsdo, nmurray, ptalbert, qzhao, rt-maint, rvrbovsk, steved, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the Linux kernel. A kernel panic can occur when concurrent calls to dw_spi_irq and dw_spi_transfer_one are made. The highest threat from this vulnerability is to system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-12-15 11:11:47 UTC	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:	1834824, 1835727
Bug Blocks:	1834825

Description Guilherme de Almeida Suckevicz 2020-05-12 13:41:47 UTC

An issue was discovered in the Linux kernel before 5.4.17. drivers/spi/spi-dw.c allows attackers to cause a panic via concurrent calls to dw_spi_irq and dw_spi_transfer_one.

Reference and upstream commit:
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.17
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19b61392c5a852b4e8a0bf35aecb969983c5932d

Comment 1 Guilherme de Almeida Suckevicz 2020-05-12 13:44:24 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1834824]

Comment 2 Justin M. Forbes 2020-05-12 19:38:15 UTC

This was fixed for Fedora with the 5.4.17 stable kernel update.

Comment 3 Petr Matousek 2020-05-14 11:53:30 UTC

Statement:

This issue is rated as having Low impact because of the preconditions needed to trigger the issue.

Comment 4 Petr Matousek 2020-05-14 11:53:38 UTC

Mitigation:

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.