Bug 1212845 (CVE-2023-3439)

Summary:	VUL-0: CVE-2023-3439: kernel-source,kernel-source-rt,kernel-source-azure: mctp: use-after-free read in mctp_local_output()
Product:	[Novell Products] SUSE Security Incidents	Reporter:	Cathy Hu <cathy.hu>
Component:	Incidents	Assignee:	Kernel Bugs <kernel-bugs>
Status:	RESOLVED INVALID	QA Contact:	Security Team bot <security-team>
Severity:	Normal
Priority:	P5 - None	CC:	security-team
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/370708/
Whiteboard:
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description Cathy Hu 2023-06-29 08:33:18 UTC

CVE-2023-3439

A flaw was found in the MCTP protocol in the Linux kernel. The function
mctp_unregister() reclaims the device's relevant resource when a netcard
detaches. However, a running routine may be unaware of this and cause the
use-after-free of the mdev->addrs object, potentially leading to a denial of
service.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-3439
https://bugzilla.redhat.com/show_bug.cgi?id=2217915
https://www.cve.org/CVERecord?id=CVE-2023-3439
https://github.com/torvalds/linux/commit/b561275d633bcd8e0e8055ab86f1a13df75a0269

Comment 1 Cathy Hu 2023-06-29 08:34:54 UTC

Fixing commit: https://github.com/torvalds/linux/commit/b561275d633bcd8e0e8055ab86f1a13df75a0269

Commit introducing the issue: https://github.com/torvalds/linux/commit/583be982d93479ea3d85091b0fd0b01201ede87d

Not affected (does not include introducing commit):
- SLE12-SP5
- SLE15-SP4-AZURE
- SLE15-SP4-RT
- SLE15-SP4
- SLE15-SP5
- SLE15-SP5-AZURE
- SLE15-SP5-RT
- cve/linux-3.0
- cve/linux-4.12
- cve/linux-4.4
- cve/linux-5.3

Not Affected (contains fix and introducing commit):
- ALP-current
- stable

closing