CVE-2025-40210: Linux 6.17

CVE-2025-40210. CVSS 3.1 base score 7.5 (HIGH, Source advisory). EPSS 0.00334 (percentile 0.25323), scored 19-Oct-2026.

Affected technology

Linux · 48aab1606fa80027143a445224f552b4eeea845b to before b3ee7ce432289deac87b9d14e01f2fe6958f7f0b, 48aab1606fa80027143a445224f552b4eeea845b to before 3e7f011c255582d7c914133785bbba1990441713
Linux

Linux · 6.17
Linux

Component: Not specified by the source
File: fs/nfsd/nfs4proc.c, fs/nfsd/nfs4state.c, fs/nfsd/nfs4xdr.c, fs/nfsd/nfsd.h, fs/nfsd/xdr4.h

Attack conditions (Source advisory, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

An attacker can place an arbitrarily large op count in the COMPOUND header, which results in: [ 51.410584] nfsd: vmalloc error: size 1209533382144, exceeds total pages, mode:0xdc0(GFP_KERNEL|__GFP_ZERO), nodemask=(null),cpuset=/,mems_allowed=0 when NFSD attempts to allocate the COMPOUND op array. Source advisory’s CVSS 3.1 assessment (base score 7.5/10) rates confidentiality and integrity impact as none; availability impact as high.

Published 19-Oct-2026 19:47 UTC

CCR priority: 30.1 /100 (P4)
CVSS 3.1: 7.5 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · Source advisory
EPSS: 0.00334 · percentile 0.25323 · 2026-10-19
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-19 19:46:42.191502+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2025-40210.html