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CVE-2025-40129

kernel: sunrpc: fix null pointer dereference on zero-length checksum

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Severity

Moderate

Red Hat Product Security

4.7

CVSS 3.1

Review impact separately from score.

Published · November 12, 2025

Updated · October 29, 2026

Description

A flaw was found in the sunrpc component in the Linux kernel. A zero-length checksum can cause a NULL pointer dereference when the checksum data is accessed by gss_krb5_verify_mic_v2(). This issue can cause a crash and result in a denial of service.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 4.7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-476 · NULL Pointer Dereference