Bug 1222702 (CVE-2021-47186)

Summary:	VUL-0: CVE-2021-47186: kernel: tipc: check for null after calling kmemdup
Product:	[Novell Products] SUSE Security Incidents	Reporter:	SMASH SMASH <smash_bz>
Component:	Incidents	Assignee:	Security Team bot <security-team>
Status:	NEW ---	QA Contact:	Security Team bot <security-team>
Severity:	Normal
Priority:	P3 - Medium	CC:	abergmann, meissner, mhocko, osalvador
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/401368/
Whiteboard:	CVSSv3.1:SUSE:CVE-2021-47186:5.5:(AV:L/AC:L/PR:L/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 2024-04-12 06:57:25 UTC

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

tipc: check for null after calling kmemdup

kmemdup can return a null pointer so need to check for it, otherwise
the null key will be dereferenced later in tipc_crypto_key_xmit as
can be seen in the trace [1].


[1] https://syzkaller.appspot.com/bug?id=bca180abb29567b189efdbdb34cbf7ba851c2a58

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47186
https://www.cve.org/CVERecord?id=CVE-2021-47186
https://git.kernel.org/stable/c/3e6db079751afd527bf3db32314ae938dc571916
https://git.kernel.org/stable/c/9404c4145542c23019a80ab1bb2ecf73cd057b10
https://git.kernel.org/stable/c/a7d91625863d4ffed63b993b5e6dc1298b6430c9
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2021/CVE-2021-47186.mbox
https://bugzilla.redhat.com/show_bug.cgi?id=2274623