CVE-2026-89673
kernel: nfsd: fix XDR padding calculation in ff_encode_getdeviceinfo
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 11, 2026
Updated · September 29, 2026
Description
A flaw was found in the Linux kernel's NFS daemon (nfsd). A remote attacker could exploit an error in the XDR (External Data Representation) padding calculation within the ff_encode_getdeviceinfo function. This mismatch between reserved and actual data size leads to the leakage of stale reply-page content to the client, potentially disclosing sensitive information. It also causes misalignment in subsequent data decoding.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-125 · Out-of-bounds Read