CVE-2026-89673nfsd: fix XDR padding calculation in ff_encode_getdeviceinfo
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from efcae97fa425ca6db9d126e37daccf2d7225cb09 before 88bce7e326c368d7df15126ccac537e54bebd467; from efcae97fa425ca6db9d126e37daccf2d7225cb09 before 74015b7be806ad9e21d46f7bd2831df280c6c783; from efcae97fa425ca6db9d126e37daccf2d7225cb09 before 41ebca28e17f84293650598f86bd69532ec1a8e0; from efcae97fa425ca6db9d126e37daccf2d7225cb09 before 62e5949f0dd5ec837af144860ff908369df4c7c9; from efcae97fa425ca6db9d126e37daccf2d7225cb09 before 8b989aaec85e1293a871d602590c951fe44b8647 | CNA record |
References
- https://git.kernel.org/stable/c/88bce7e326c368d7df15126ccac537e54bebd467
- 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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.