Bug 2320215 (CVE-2024-49852)

Summary:	CVE-2024-49852 kernel: scsi: elx: libefc: Fix potential use after free in efc_nport_vport_del()
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:
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Bug Depends On:	2320301
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Description OSIDB Bzimport 2024-10-21 13:02:55 UTC

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

scsi: elx: libefc: Fix potential use after free in efc_nport_vport_del()

The kref_put() function will call nport->release if the refcount drops to
zero.  The nport->release release function is _efc_nport_free() which frees
"nport".  But then we dereference "nport" on the next line which is a use
after free.  Re-order these lines to avoid the use after free.

Comment 1 Robb Gatica 2024-10-21 13:54:24 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024102152-CVE-2024-49852-875e@gregkh/T