Bug 1226988 (CVE-2024-39470)

Summary:	VUL-0: CVE-2024-39470: kernel: eventfs: Fix a possible null pointer dereference in eventfs_find_events()
Product:	[Novell Products] SUSE Security Incidents	Reporter:	SMASH SMASH <smash_bz>
Component:	Incidents	Assignee:	Security Team bot <security-team>
Status:	RESOLVED FIXED	QA Contact:	Security Team bot <security-team>
Severity:	Normal
Priority:	P3 - Medium	CC:	carlos.lopez, mhocko, petr.pavlu
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/412101/
Whiteboard:	CVSSv3.1:SUSE:CVE-2024-39470:4.4:(AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H)
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description SMASH SMASH 2024-06-26 07:40:46 UTC

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

eventfs: Fix a possible null pointer dereference in eventfs_find_events()

In function eventfs_find_events,there is a potential null pointer
that may be caused by calling update_events_attr which will perform
some operations on the members of the ei struct when ei is NULL.

Hence,When ei->is_freed is set,return NULL directly.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-39470
https://www.cve.org/CVERecord?id=CVE-2024-39470
https://git.kernel.org/stable/c/5ade5fbdbbb1f023bb70730ba4d74146c8bc7eb9
https://git.kernel.org/stable/c/7a1b2d138189375ed1dcd7d0851118230221bd1d
https://git.kernel.org/stable/c/d4e9a968738bf66d3bb852dd5588d4c7afd6d7f4
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-39470.mbox
https://bugzilla.redhat.com/show_bug.cgi?id=2294311

Comment 2 Andrea Mattiazzo 2024-07-01 13:33:51 UTC

All done, closing.