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CVE-2026-63800: linux kernel 5.11; +1 more affected products

CVE-2026-63800. CVSS 3.1 base score 9.8 (CRITICAL, Source advisory). EPSS 0.00527 (percentile 0.43352), scored 15-Oct-2026.

Affected technology

linux kernel · from 5.4.91 (inclusive), before 5.5 (exclusive)
linux

linux kernel · from 5.10.9 (inclusive), before 5.10.260 (exclusive)
linux

linux kernel · from 5.11.1 (inclusive), before 5.15.211 (exclusive)
linux

linux kernel · from 5.16 (inclusive), before 6.1.177 (exclusive)
linux

linux kernel · from 6.2 (inclusive), before 6.6.144 (exclusive)
linux

linux kernel · from 6.7 (inclusive), before 6.12.95 (exclusive)
linux

linux kernel · from 6.13 (inclusive), before 6.18.38 (exclusive)
linux

linux kernel · from 6.19 (inclusive), before 7.1.3 (exclusive)
linux

linux kernel · 5.11
linux

linux kernel · 5.11 · update rc4
linux

linux kernel · 5.11 · update rc5
linux

linux kernel · 5.11 · update rc6
linux

linux kernel · 5.11 · update rc7
linux

Linux · 06f58dbc49a23c99e5c0f246879ed16667f7bf8f to before 4ad8b9a85dbf57ca532ee9e65ad7e6498bfbbf98, 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 to before 1f24b8302c77dcaf79c64c073877a3b9f4dd25d2, 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 to before 9c0fb5c09ae5bd68dc0038692af8127029cb0385, 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 to before 7e37e9b3e82ade881e1798e2f4fcc54aff7793c1, 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 to before 2883ddd7542b4437a2ab4908fe2773f690e20889, 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 to before 200e7637f4d6a1342987045eea72641524f909dc, 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 to before 9645aaf689aff57427ece3b9fa47d5b5399417f4, 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 to before 13e198a90ca4050f4bee8a3f23680389a6563ccc, aa2399f55eff4ec78330bb6fe55f9df53e5cae0c, 5.10.9 to before 5.10.260, 5.4.91 to before 5.5
Linux

Linux · 5.11
Linux

Component: Not specified by the source
File: fs/nfs/pnfs.c

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

What an attacker can do

A remote attacker can trigger a use-after-free error. Source advisory’s CVSS 3.1 assessment (base score 9.8/10) rates confidentiality, integrity and availability impact as high. The description does not state a further attacker outcome.

Published

CWE
CWE-416
CCR priority
39.3 /100 (P4)
CVSS 3.1
9.8 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · Source advisory
EPSS
0.00527 · percentile 0.43352 · 2026-10-15
KEV
no

Provenance

Stable permalink: https://cybercodered.org/item/cve-cve-2026-63800.html