2383466 – (CVE-2025-38432) CVE-2025-38432 kernel: net: netpoll: Initialize UDP checksum field before checksumming

Bug 2383466 (CVE-2025-38432) - CVE-2025-38432 kernel: net: netpoll: Initialize UDP checksum field before checksumming

Summary: CVE-2025-38432 kernel: net: netpoll: Initialize UDP checksum field before che...

Keywords:
Status:	NEW
Alias:	CVE-2025-38432
Product:	Security Response
Classification:	Other
Component:	vulnerability
Sub Component:
Version:	unspecified
Hardware:	All
OS:	Linux
Priority:	unspecified
Severity:	unspecified
Target Milestone:	---
Assignee:	Product Security DevOps Team
QA Contact:
Docs Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+	depends on / blocked

Reported:	2025-07-25 15:02 UTC by OSIDB Bzimport
Modified:	2026-06-29 18:33 UTC (History)
CC List:	2 users (show)
Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Description OSIDB Bzimport 2025-07-25 15:02:26 UTC

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

net: netpoll: Initialize UDP checksum field before checksumming

commit f1fce08e63fe ("netpoll: Eliminate redundant assignment") removed
the initialization of the UDP checksum, which was wrong and broke
netpoll IPv6 transmission due to bad checksumming.

udph->check needs to be set before calling csum_ipv6_magic().

Comment 1 Jon Moroney 2025-07-25 17:38:31 UTC Comment hidden (spam)

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