CVE-2026-89673

CVE CVE-2026-89673EUVD EUVD-2026-76585Published 2026-09-11T19:45:58.000ZLast changed 2026-09-14T12:01:58.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 6.4.16 <6.18.50; 6.4.16 <6.6.157; efcae97fa425ca6db9d126e37daccf2d7225cb09 <74015b7be806ad9e21d46f7bd2831df280c6c783; 6.4.16 <6.12.109; efcae97fa425ca6db9d126e37daccf2d7225cb09 <41ebca28e17f84293650598f86bd69532ec1a8e0; efcae97fa425ca6db9d126e37daccf2d7225cb09 <62e5949f0dd5ec837af144860ff908369df4c7c9; efcae97fa425ca6db9d126e37daccf2d7225cb09 <8b989aaec85e1293a871d602590c951fe44b8647; efcae97fa425ca6db9d126e37daccf2d7225cb09 <88bce7e326c368d7df15126ccac537e54bebd467; 6.4.16 <7.2.4; 6.4.16 <7.3-rc1

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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