Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: NFS: Check the TLS certificate fields in nfs_match_client() If the TLS security… (CVE-2025-68243)
In the Linux kernel, the following vulnerability has been resolved: NFS: Check the TLS certificate fields in nfs_match_client() If the TLS security policy is of type RPC_XPRTSEC_TLS_X509, then the cert_serial and privkey_serial fields need to match as well since they define the client's identity, as presented to the server.
AI Analysis
Technical Summary
The Linux kernel contained a vulnerability in the NFS subsystem where the nfs_match_client() function did not properly verify that the cert_serial and privkey_serial fields matched when using the TLS security policy type RPC_XPRTSEC_TLS_X509. This mismatch could allow an attacker to bypass client identity verification in TLS-secured NFS connections. The issue has been resolved in the Linux kernel, ensuring that both serial fields are checked to confirm client identity.
Potential Impact
If exploited, this vulnerability could allow an attacker with local access to bypass TLS client identity verification in NFS connections, potentially leading to unauthorized access or privilege escalation. The CVSS 3.1 vector indicates a high impact on confidentiality, integrity, and availability, requiring local attack complexity and low privileges.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to properly check the TLS certificate fields in nfs_match_client(). Users should apply the official kernel updates that include this patch. Since this is a kernel-level vulnerability, upgrading to the fixed kernel version is the recommended remediation. No additional mitigations are specified.
Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: NFS: Check the TLS certificate fields in nfs_match_client() If the TLS security… (CVE-2025-68243)
Description
In the Linux kernel, the following vulnerability has been resolved: NFS: Check the TLS certificate fields in nfs_match_client() If the TLS security policy is of type RPC_XPRTSEC_TLS_X509, then the cert_serial and privkey_serial fields need to match as well since they define the client's identity, as presented to the server.
CVSS v3.1
Score 7.0high
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel contained a vulnerability in the NFS subsystem where the nfs_match_client() function did not properly verify that the cert_serial and privkey_serial fields matched when using the TLS security policy type RPC_XPRTSEC_TLS_X509. This mismatch could allow an attacker to bypass client identity verification in TLS-secured NFS connections. The issue has been resolved in the Linux kernel, ensuring that both serial fields are checked to confirm client identity.
Potential Impact
If exploited, this vulnerability could allow an attacker with local access to bypass TLS client identity verification in NFS connections, potentially leading to unauthorized access or privilege escalation. The CVSS 3.1 vector indicates a high impact on confidentiality, integrity, and availability, requiring local attack complexity and low privileges.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to properly check the TLS certificate fields in nfs_match_client(). Users should apply the official kernel updates that include this patch. Since this is a kernel-level vulnerability, upgrading to the fixed kernel version is the recommended remediation. No additional mitigations are specified.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-3m9h-22j9-8m85
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2025-68243"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a6b72d39c2644c7f8478917
Added to database: 07/30/2026, 15:50:43 UTC
Last enriched: 07/30/2026, 18:08:58 UTC
Last updated: 09/10/2026, 19:36:51 UTC
Views: 18
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