Bug 1610102 (CVE-2018-14615)

Summary:	CVE-2018-14615 kernel: Buffer overflow in fs/f2fs/inline.c:truncate_inline_inode() when unmounting a crafted f2fs image
Product:	[Other] Security Response	Reporter:	Sam Fowler <sfowler>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	abhgupta, airlied, aquini, bhu, blc, bskeggs, dbaker, dhoward, esammons, ewk, fhrbata, hdegoede, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jarodwilson, jforbes, jglisse, jkacur, john.j5live, jokerman, jonathan, josef, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, lwang, matt, mchehab, mcressma, mguzik, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, skozina, slawomir, steved, sthangav, trankin, vdronov, 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 issue was discovered in the Linux kernel's F2FS filesystem code. A buffer overflow in truncate_inline_inode() in the fs/f2fs/inline.c function, when umounting a crafted f2fs image, can occur because a length value may be negative.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-08-02 16:42:16 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:	1610103, 1610104
Bug Blocks:	1610105

Description Sam Fowler 2018-07-31 01:47:52 UTC

An issue was discovered in the Linux kernel in the F2FS filesystem code. There is a buffer overflow in truncate_inline_inode() in fs/f2fs/inline.c when umounting a crafted f2fs image, because a length value may be negative.

Upstream Bug:

https://bugzilla.kernel.org/show_bug.cgi?id=200421

Comment 1 Sam Fowler 2018-07-31 01:49:05 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1610103]

Comment 5 Vladis Dronov 2018-08-02 16:42:16 UTC

Note:

An F2FS filesystem is not shipped with any of the Red Hat products.

Comment 6 Justin M. Forbes 2018-09-11 20:48:51 UTC

This is fixed for Fedora with the 4.18 rebases.