Bug 1969541 (CVE-2019-25045)

Summary:	CVE-2019-25045 kernel: use-after-free in the XFRM subsystem related to an xfrm_state_fini() panic
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, adscvr, airlied, alciregi, bdettelb, bhu, blc, bmasney, brdeoliv, bskeggs, chwhite, crwood, dhoward, dvlasenk, fhrbata, fpacheco, hdegoede, hkrzesin, jarodwilson, jeremy, jforbes, jglisse, jlelli, jonathan, josef, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, mlangsdo, nmurray, ptalbert, qzhao, rvrbovsk, steved, tomckay, walters, wcosta, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 5.1-rc1	Doc Type:	If docs needed, set a value
Doc Text:	A use-after-free flaw was found in the Linux kernel’s XFRM subsystem when flushing the XFRM tunnel. This flaw allows a local user to crash the system or possibly escalate their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-06-21 15:03:57 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:	1969542
Bug Blocks:	1969544

Description Guilherme de Almeida Suckevicz 2021-06-08 14:52:49 UTC

An issue was discovered in the Linux kernel before 5.0.19. The XFRM subsystem has a use-after-free, related to an xfrm_state_fini panic.

Reference:
https://sites.google.com/view/syzscope/warning-in-xfrm_state_fini-2

Upstream patch:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dbb2483b2a46fbaf833cfb5deb5ed9cace9c7399

Comment 1 Guilherme de Almeida Suckevicz 2021-06-08 14:53:23 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1969542]

Comment 2 Justin M. Forbes 2021-06-08 19:09:59 UTC

This was fixed for Fedora in the 5.0.19 stable kernel updates.

Comment 5 Product Security DevOps Team 2021-06-21 15:03:57 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-2019-25045