P4Verified

CVE-2025-21999: linux kernel from 2.6.23 (inclusive), before 6.1.132 (exclusive), from 6.2 (inclusive), before 6.6.85 (exclusive)…

CVE-2025-21999. CVSS 3.1 base score 7.8 (HIGH, Source advisory). EPSS 0.00228 (percentile 0.12593), scored 14-Oct-2026.

Affected technology

linux kernel · from 2.6.23 (inclusive), before 6.1.132 (exclusive)
linux

linux kernel · from 6.2 (inclusive), before 6.6.85 (exclusive)
linux

linux kernel · from 6.7 (inclusive), before 6.12.21 (exclusive)
linux

linux kernel · from 6.13 (inclusive), before 6.13.9 (exclusive)
linux

linux kernel · 6.14 · update rc1
linux

linux kernel · 6.14 · update rc2
linux

linux kernel · 6.14 · update rc3
linux

linux kernel · 6.14 · update rc4
linux

Linux · 97a32539b9568bb653683349e5a76d02ff3c3e2c to before eda279586e571b05dff44d48e05f8977ad05855d, 97a32539b9568bb653683349e5a76d02ff3c3e2c to before 4b0b8445b6fd41e6f62ac90547a0ea9d348de3fa, 97a32539b9568bb653683349e5a76d02ff3c3e2c to before 966f331403dc3ed04ff64eaf3930cf1267965e53, 97a32539b9568bb653683349e5a76d02ff3c3e2c to before 63b53198aff2e4e6c5866a4ff73c7891f958ffa4, 97a32539b9568bb653683349e5a76d02ff3c3e2c to before ede3e8ac90ae106f0b29cd759aadebc1568f1308, 97a32539b9568bb653683349e5a76d02ff3c3e2c to before 64dc7c68e040251d9ec6e989acb69f8f6ae4a10b, 97a32539b9568bb653683349e5a76d02ff3c3e2c to before 654b33ada4ab5e926cd9c570196fefa7bec7c1df
Linux

Linux · 5.6
Linux

SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · V3.1.6 to before *
Siemens

SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · V3.1.7 to before *
Siemens

SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · V3.1.6 to before *
Siemens

SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · V3.1.7 to before *
Siemens

SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · V3.1.6 to before *
Siemens

SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · V3.1.7 to before *
Siemens

Component: Not specified by the source
File: fs/proc/generic.c, fs/proc/inode.c, fs/proc/internal.h, include/linux/proc_fs.h

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

What an attacker can do

Source advisory’s CVSS 3.1 assessment (base score 7.8/10) rates confidentiality, integrity and availability impact as high. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 15-Oct-2026 09:20 UTC

CWE: CWE-416
CCR priority: 31.3 /100 (P4)
CVSS 3.1: 7.8 /10 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H · Source advisory
EPSS: 0.00228 · percentile 0.12593 · 2026-10-14
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-15 09:24:28.011626+00:00 UTC
GitHub Advisory Database · Source record · observed 2026-10-15 10:43:56.988652+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-15 09:18:22.406219+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2025-21999.html