Bug 1784917 (CVE-2019-19814)

Summary:	CVE-2019-19814 kernel: out-of-bounds write in __remove_dirty_segment in fs/f2fs/segment.c
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, airlied, bdettelb, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, john.j5live, jonathan, josef, jross, jschorr, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, masami256, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, 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:	An out-of-bounds (OOB) memory access flaw was found in the Linux kernel's F2FS file system exploiting the NAND flash memory-based storage device. This flaw allows a local attacker to crash the system or leak internal kernel information.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-04-06 22:32:12 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:	1784918
Bug Blocks:	1784919

Description Guilherme de Almeida Suckevicz 2019-12-18 17:46:52 UTC

An out of bounds (OOB) memory access flaw was found in the Linux kernel's F2FS  file system exploiting NAND flash memory-based storage device. This could allow a local attacker to crash the system or leak kernel internal information.

Reference:
https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19814

Comment 1 Guilherme de Almeida Suckevicz 2019-12-18 17:47:50 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1784918]

Comment 4 Rohit Keshri 2020-04-06 15:13:45 UTC

Statement:

There was no shipped kernel version were seen affected with this problem. These files are not built in our source code.

Comment 5 Rohit Keshri 2020-04-06 15:13:50 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.

Comment 7 Product Security DevOps Team 2020-04-06 22:32:12 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-19814