CVE-2026-89673
N/A
Summary
In the Linux kernel, the following vulnerability has been resolved:
nfsd: fix XDR padding calculation in ff_encode_getdeviceinfo
nfsd4_ff_encode_getdeviceinfo() computes the da_addr_body reservation as 16 + netid_len + addr_len, but the subsequent xdr_encode_opaque() calls emit 8 + round_up(netid_len, 4) + round_up(addr_len, 4) bytes. The mismatch means the declared da_addr_body length exceeds the actual encoded data by 2-8 bytes on every flexfile GETDEVICEINFO reply, leaking stale reply-page content to the client and mis-aligning the subsequent version list decode.
Use xdr_align_size() for each string length to match what xdr_encode_opaque() actually writes.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | efcae97fa425ca6db9d126e37daccf2d7225cb09 < 74015b7be806ad9e21d46f7bd2831df280c6c783 | affected |
| Linux | Linux | efcae97fa425ca6db9d126e37daccf2d7225cb09 < 41ebca28e17f84293650598f86bd69532ec1a8e0 | affected |
| Linux | Linux | efcae97fa425ca6db9d126e37daccf2d7225cb09 < 62e5949f0dd5ec837af144860ff908369df4c7c9 | affected |
| Linux | Linux | efcae97fa425ca6db9d126e37daccf2d7225cb09 < 8b989aaec85e1293a871d602590c951fe44b8647 | affected |
| Linux | Linux | 6.4.16 < 6.12.109 | affected |
| Linux | Linux | 6.4.16 < 6.18.50 | affected |
| Linux | Linux | 6.4.16 < 7.2.4 | affected |
| Linux | Linux | 6.4.16 < 7.3-rc1 | affected |
Weaknesses
References
- https://git.kernel.org/stable/c/74015b7be806ad9e21d46f7bd2831df280c6c783
- https://git.kernel.org/stable/c/41ebca28e17f84293650598f86bd69532ec1a8e0
- https://git.kernel.org/stable/c/62e5949f0dd5ec837af144860ff908369df4c7c9
- https://git.kernel.org/stable/c/8b989aaec85e1293a871d602590c951fe44b8647
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