What’s Vulnerable › Vulnerabilities

CVE-2025-68243: NFS: Check the TLS certificate fields in nfs_match_client()

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-16 · updated 2026-10-14

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.

Affected products

• Linux kernel: 6.17 — fixed in 6.18

How to fix

Upgrade to a fixed version: Linux kernel 6.18. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/b8fa37219074811c04d4ecb742c73e2b296da6a8
• https://git.kernel.org/stable/c/fb2cba0854a7f315c8100a807a6959b99d72479e

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