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CVE-2025-21758: linux kernel from 2.6.26 (inclusive), before 5.15.179 (exclusive), from 5.16 (inclusive), before 6.1.129 (exclusive)…
CVE-2025-21758. CVSS 3.1 base score 5.5 (MEDIUM, NVD). EPSS 0.16641 (percentile 0.9698), scored 14-Oct-2026.
Affected technology
linux kernel · from 2.6.26 (inclusive), before 5.15.179 (exclusive)
linux
linux kernel · from 5.16 (inclusive), before 6.1.129 (exclusive)
linux
linux kernel · from 6.2 (inclusive), before 6.6.79 (exclusive)
linux
linux kernel · from 6.7 (inclusive), before 6.12.16 (exclusive)
linux
linux kernel · from 6.13 (inclusive), before 6.13.4 (exclusive)
linux
linux kernel · 6.14 · update rc1
linux
linux kernel · 6.14 · update rc2
linux
Linux · b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551 to before 29fa42197f26a97cde29fa8c40beddf44ea5c8f3, b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551 to before e8af3632a7f2da83e27b083f787bced1faba00b1, b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551 to before 1b91c597b0214b1b462eb627ec02658c944623f2, b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551 to before 25195f9d5ffcc8079ad743a50c0409dbdc48d98a, b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551 to before d60d493b0e65647e0335e6a7c4547abcea7df8e9, b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551 to before a527750d877fd334de87eef81f1cb5f0f0ca3373
Linux
Linux · 2.6.26
Linux
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · V3.1.5 to before *
Siemens
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 · V3.1.5 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
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem · 0 to before *
Siemens
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · V3.1.5 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: net/ipv6/mcast.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 5.5/10) 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.
- CCR priority
- 26.2 /100 (P4)
- CVSS 3.1
- 5.5 /10 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H · NVD
- EPSS
- 0.16641 · percentile 0.9698 · 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-2025-21758.html