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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-89701

nfsd: validate nseconds in TIME_DELEG decode paths

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Status
Published
Published
Updated
Assigning organization
Linux

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

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 6ae30d6eb26bce02c48c60074b4306270e2434c1 to < 7e7b93da7fa2e77f977096251899d1410986adf6affected
  • 6ae30d6eb26bce02c48c60074b4306270e2434c1 to < 5eb489831a9fd4754f4baf26e6989efb66ce104caffected
  • 6ae30d6eb26bce02c48c60074b4306270e2434c1 to < 0f4a767340fad392bd656115b8752005518c9065affected

Linux Linux

Default version status: affected

  • 6.14affected
  • 0 to < 6.14unaffected
  • 6.18.50 to ≤ 6.18.*unaffected
  • 7.2.4 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References