Bug 2337119 (CVE-2024-49568)

Summary:	CVE-2024-49568 kernel: net/smc: check v2_ext_offset/eid_cnt/ism_gid_cnt when receiving proposal msg
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	dfreiber, drow, jburrell, vkumar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2025-01-11 13:02:54 UTC

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

net/smc: check v2_ext_offset/eid_cnt/ism_gid_cnt when receiving proposal msg

When receiving proposal msg in server, the fields v2_ext_offset/
eid_cnt/ism_gid_cnt in proposal msg are from the remote client
and can not be fully trusted. Especially the field v2_ext_offset,
once exceed the max value, there has the chance to access wrong
address, and crash may happen.

This patch checks the fields v2_ext_offset/eid_cnt/ism_gid_cnt
before using them.

Comment 1 Avinash Hanwate 2025-01-13 06:58:10 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025011142-CVE-2024-49568-e5f6@gregkh/T

Comment 3 Avinash Hanwate 2025-01-13 09:36:52 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025011142-CVE-2024-49568-e5f6@gregkh/T