CVE-2026-89701
N/A
N/A
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 6ae30d6eb26bce02c48c60074b4306270e2434c1 < 7e7b93da7fa2e77f977096251899d1410986adf6 | affected |
| Linux | Linux | 6ae30d6eb26bce02c48c60074b4306270e2434c1 < 5eb489831a9fd4754f4baf26e6989efb66ce104c | affected |
| Linux | Linux | 6ae30d6eb26bce02c48c60074b4306270e2434c1 < 0f4a767340fad392bd656115b8752005518c9065 | affected |
| Linux | Linux | 6.14 | affected |
| Linux | Linux | 0 < 6.14 | unaffected |
| Linux | Linux | 6.18.50 <= 6.18.* | unaffected |
| Linux | Linux | 7.2.4 <= 7.2.* | unaffected |
| Linux | Linux | 7.3-rc1 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/7e7b93da7fa2e77f977096251899d1410986adf6
- https://git.kernel.org/stable/c/5eb489831a9fd4754f4baf26e6989efb66ce104c
- https://git.kernel.org/stable/c/0f4a767340fad392bd656115b8752005518c9065
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.