CVE-2026-89673

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.

EPSS

0.2% chance of exploitation in the next 30 days; higher than 11% of CVEs (scores of 2026-10-25)

Published

2026-09-11

Modified

2026-10-24

Record from

the NVD, synced 2026-10-24

References

• https://git.kernel.org/stable/c/15460c8e6c9bc92cda8f68bc419ac082300ab3d6
• https://git.kernel.org/stable/c/356decf074b82bac5564568203c12426dcea3470
• https://git.kernel.org/stable/c/41ebca28e17f84293650598f86bd69532ec1a8e0
• https://git.kernel.org/stable/c/62e5949f0dd5ec837af144860ff908369df4c7c9
• https://git.kernel.org/stable/c/74015b7be806ad9e21d46f7bd2831df280c6c783

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