CVE-2026-89701
Unknown
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).
SeverityUnknown
CVSS—
Exploit probability11. percentile0.2%
Product
Linux
PublishedSep 11, 2026
First seenSep 11, 2026
How to fix
Update
- Linux Linux7e7b93da7fa2e77f977096251899d1410986adf6, 5eb489831a9fd4754f4baf26e6989efb66ce104c, 0f4a767340fad392bd656115b8752005518c9065 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 6ae30d6eb26bce02c48c60074b4306270e2434c1 ≤ v < 7e7b93da7fa2e77f977096251899d1410986adf6, 6ae30d6eb26bce02c48c60074b4306270e2434c1 ≤ v < 5eb489831a9fd4754f4baf26e6989efb66ce104c, 6ae30d6eb26bce02c48c60074b4306270e2434c1 ≤ v < 0f4a767340fad392bd656115b8752005518c9065, 6.14 | 7e7b93da7fa2e77f977096251899d1410986adf6, 5eb489831a9fd4754f4baf26e6989efb66ce104c, 0f4a767340fad392bd656115b8752005518c9065 |
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