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CVE-2026-89680

7.5 · HIGH

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix nfsd_file leak on inter-server COPY setup failure When nfsd4_setup_inter_ssc() fails, nfsd4_copy() returns nfserr_off…

Published Sep 11, 2026EPSS 0.74%

Overview

CVE-2026-89680 is a high-severity vulnerability. It was published on September 11, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

nfsd: fix nfsd_file leak on inter-server COPY setup failure

When nfsd4_setup_inter_ssc() fails, nfsd4_copy() returns

nfserr_offload_denied directly, bypassing the out: label where

release_copy_files() would drop the nf_dst reference taken by

nfs4_preprocess_stateid_op(). Each failed inter-server COPY

leaks one nfsd_file, pinning file/inode/dentry/vfsmount.

Fix by setting status and jumping to out: instead of returning

directly.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/1a6a41b848455bf6ba2c9da2dfb0730e608ce7abRefgit.kernel.org/stable/c/424d5c95108a4809b832cb0a312c61de4aec0078Refgit.kernel.org/stable/c/6ed8d6de7ec90c4ba84eb82673058f506e5777fdRefgit.kernel.org/stable/c/88a76145451d703eedd867b5989bf73d17340399Refgit.kernel.org/stable/c/94c28af6fd89cb204975e49b824f8ee521bb84e9Refgit.kernel.org/stable/c/ab949252fdf102ae74329a0caa7995a849d0dafaRefgit.kernel.org/stable/c/d15f76fddc5d0215db5f18851048376a1ea79bd6Refgit.kernel.org/stable/c/eb22420e5bd6eb3afa1f840036bb08a7ac90db76

How CyberStrike helps

Frequently asked questions

What is CVE-2026-89680?

CVE-2026-89680 is a high-severity vulnerability. It was published on September 11, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-89680?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-89680?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-89680?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-89680 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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