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CVE-2025-21655: linux kernel from 6.1 (inclusive), before 6.1.125 (exclusive), from 6.2 (inclusive), before 6.6.72 (exclusive), from…
CVE-2025-21655. CVSS 3.1 base score 4.7 (MEDIUM, NVD). EPSS 0.00253 (percentile 0.15599), scored 14-Oct-2026.
Affected technology
linux kernel · from 6.1 (inclusive), before 6.1.125 (exclusive)
linux
linux kernel · from 6.2 (inclusive), before 6.6.72 (exclusive)
linux
linux kernel · from 6.7 (inclusive), before 6.12.10 (exclusive)
linux
linux kernel · 6.13 · update rc1
linux
linux kernel · 6.13 · update rc2
linux
linux kernel · 6.13 · update rc3
linux
linux kernel · 6.13 · update rc4
linux
linux kernel · 6.13 · update rc5
linux
linux kernel · 6.13 · update rc6
linux
Linux · 21a091b970cdbcf3e8ff829234b51be6f9192766 to before 6b63308c28987c6010b1180c72a6db4df6c68033, 21a091b970cdbcf3e8ff829234b51be6f9192766 to before 8efff2aa2d95dc437ab67c5b4a9f1d3f367baa10, 21a091b970cdbcf3e8ff829234b51be6f9192766 to before a7085c3ae43b86d4b3d1b8275e6a67f14257e3b7, 21a091b970cdbcf3e8ff829234b51be6f9192766 to before c9a40292a44e78f71258b8522655bffaf5753bdb
Linux
Linux · 6.1
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: io_uring/eventfd.c
Attack conditions (Source advisory, CVSS 3.1): Local · Low privileges required · No user interaction required
Attack conditions (NVD, 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. NVD’s CVSS 3.1 assessment (base score 4.7/10) rates confidentiality and integrity impact as none; availability impact as high. The description does not specify what an attacker can achieve beyond these rated impacts.
- CWE
- CWE-416
- CCR priority
- 18.9 /100 (P5)
- CVSS 3.1
- 4.7 /10 · CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H · NVD
- EPSS
- 0.00253 · percentile 0.15599 · 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-2025-21655.html