# CVE-2026-89701

## Summary

- **CVE ID:** CVE-2026-89701
- **Severity:** UNKNOWN
- **CVSS Score:** 1.51
- **CWE:** N/A
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 16, 2026

## Description

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

nfsd: validate nseconds in TIME_DELEG decode paths

The xdrgen-based TIME_DELEG_ACCESS and TIME_DELEG_MODIFY decode arms
store a raw uint32_t nseconds directly into tv_nsec without enforcing
nseconds < NSEC_PER_SEC. The legacy nfsd4_decode_nfstime4 has this
check but the TIME_DELEG paths do not. A malformed timespec can
propagate through notify_change() to disk.

Add range checks in both nfs4xdr.c (SETATTR path) and
nfs4callback.c (CB_GETATTR path).

## Affected Products

- Linux — Linux (6ae30d6eb26bce02c48c60074b4306270e2434c1)
- Linux — Linux (6.14)
- Linux — Linux (0)
- Linux — Linux (6.18.50)
- Linux — Linux (7.2.4)
- Linux — Linux (7.3-rc1)

## References

- [CNA](https://git.kernel.org/stable/c/7e7b93da7fa2e77f977096251899d1410986adf6)
- [CNA](https://git.kernel.org/stable/c/5eb489831a9fd4754f4baf26e6989efb66ce104c)
- [CNA](https://git.kernel.org/stable/c/0f4a767340fad392bd656115b8752005518c9065)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.17%
- **EPSS Percentile:** 6.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._