nfsd: validate nseconds in TIME_DELEG decode paths

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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).

Source published

11 Sep 2026 19:46:18 UTC

Source modified

19 Oct 2026 08:51:14 UTC

Observed here

23 Oct 2026 15:48:27 UTC

Source terms

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