CVE-2025-38432

kernel: net: netpoll: Initialize UDP checksum field before checksumming

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Severity

Unknown

Red Hat Product Security

—

CVSS

Review impact separately from score.

Published · July 25, 2025

Updated · June 30, 2026

Description

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().

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CWE not specified