Bug 1969529 (CVE-2018-25015)

Summary:	CVE-2018-25015 kernel: use-after-free in net/sctp/socket.c for a held lock after a peel off
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:	high	Docs Contact:
Priority:	high
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:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the Linux kernel. There is a use-after-free in net/sctp/socket.c for a held lock after a peel off. The highest threat from the vulnerability is to data confidentiality and integrity as well as system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-06-11 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:	1969530
Bug Blocks:	1969531

Description Guilherme de Almeida Suckevicz 2021-06-08 14:33:21 UTC

An issue was discovered in the Linux kernel before 4.14.16. There is a use-after-free in net/sctp/socket.c for a held lock after a peel off.

Reference:
https://sites.google.com/view/syzscope/warning-held-lock-freed

Upstream patch:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a0ff660058b88d12625a783ce9e5c1371c87951f

Comment 1 Guilherme de Almeida Suckevicz 2021-06-08 14:33:59 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1969530]

Comment 2 Justin M. Forbes 2021-06-08 19:06:28 UTC

This was fixed for Fedora with the 4.6.16 stable kernel updates.

Comment 6 Product Security DevOps Team 2021-06-11 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-2018-25015