Bug 2360221 (CVE-2025-22029)

Summary:	CVE-2025-22029 kernel: exec: fix the racy usage of fs_struct->in_exec
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	unspecified	CC:	dfreiber, drow, jburrell, vkumar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	[REJECTED CVE] In the Linux kernel, the following vulnerability has been resolved: exec: fix the racy usage of fs_struct->in_exec	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2025-04-16 15:03:21 UTC

In the Linux kernel, the following vulnerability has been resolved:

exec: fix the racy usage of fs_struct->in_exec

check_unsafe_exec() sets fs->in_exec under cred_guard_mutex, then execve()
paths clear fs->in_exec lockless. This is fine if exec succeeds, but if it
fails we have the following race:

	T1 sets fs->in_exec = 1, fails, drops cred_guard_mutex

	T2 sets fs->in_exec = 1

	T1 clears fs->in_exec

	T2 continues with fs->in_exec == 0

Change fs/exec.c to clear fs->in_exec with cred_guard_mutex held.

Comment 1 Avinash Hanwate 2025-04-17 13:25:20 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025041655-CVE-2025-22029-349f@gregkh/T

Comment 2 TEJ RATHI 2025-05-29 06:40:48 UTC

This CVE has been rejected by the Linux kernel community. Refer to the announcement: https://lore.kernel.org/linux-cve-announce/2025050126-REJECTED-7655@gregkh/

Comment added by: Automated Script