Bug 2393498 (CVE-2025-39695)

Summary:	CVE-2025-39695 kernel: RDMA/rxe: Flush delayed SKBs while releasing RXE resources
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	Keywords:	Security
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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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Description OSIDB Bzimport 2025-09-05 18:02:25 UTC

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

RDMA/rxe: Flush delayed SKBs while releasing RXE resources

When skb packets are sent out, these skb packets still depends on
the rxe resources, for example, QP, sk, when these packets are
destroyed.

If these rxe resources are released when the skb packets are destroyed,
the call traces will appear.

To avoid skb packets hang too long time in some network devices,
a timestamp is added when these skb packets are created. If these
skb packets hang too long time in network devices, these network
devices can free these skb packets to release rxe resources.

Comment 1 Jon Moroney 2025-09-05 21:50:48 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025090547-CVE-2025-39695-1126@gregkh/T