CVE-2025-68243

kernel: NFS: Check the TLS certificate fields in nfs_match_client()

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Severity

Moderate

Red Hat Product Security

4.7

CVSS 3.1

Review impact separately from score.

Published · December 16, 2025

Updated · July 30, 2026

Description

A flaw was found in the NFS client's connection matching logic in the Linux kernel. When using TLS with X.509 certificates (RPC_XPRTSEC_TLS_X509), nfs_match_client() does not verify the cert_serial and privkey_serial fields. This could allow unintended client connection reuse between sessions with different TLS identities.

Statement

This issue affects NFS over TLS configurations using X.509 certificates for client authentication. Standard NFS deployments without TLS are unaffected.

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-295 · Improper Certificate Validation