Bug 2396503 (CVE-2023-53432)

Summary:	CVE-2023-53432 kernel: firewire: net: fix use after free in fwnet_finish_incoming_packet()
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:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the Linux kernel's FireWire network driver. This issue allows an attacker on an adjacent FireWire bus to cause a Denial of Service (DoS) or potential memory corruption via a use-after-free condition. When processing incoming network packets, the driver accesses a network buffer after it has already been freed, leading to a system crash.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2025-09-18 17:01:58 UTC

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

firewire: net: fix use after free in fwnet_finish_incoming_packet()

The netif_rx() function frees the skb so we can't dereference it to
save the skb->len.

Comment 1 Keith Grant 2025-09-18 20:05:50 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091857-CVE-2023-53432-bc37@gregkh/T