Riskcovery

CVE-2026-89701

nfsd: validate nseconds in TIME_DELEG decode paths

State
Published
Severity
Not scored
Published
Sep 11, 2026
Updated
Oct 19, 2026
Reserved
Sep 11, 2026

Read the record on cve.org

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).

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 6ae30d6eb26bce02c48c60074b4306270e2434c1 to before 7e7b93da7fa2e77f977096251899d1410986adf6Affected
  • 6ae30d6eb26bce02c48c60074b4306270e2434c1 to before 5eb489831a9fd4754f4baf26e6989efb66ce104cAffected
  • 6ae30d6eb26bce02c48c60074b4306270e2434c1 to before 0f4a767340fad392bd656115b8752005518c9065Affected
LinuxLinux
  • 6.14Affected
  • before 6.14Not affected
  • 6.18.50 through 6.18.*Not affected
  • 7.2.4 through 7.2.*Not affected
  • 7.3 and laterNot affected

References

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