CVE-2025-40258: Linux 5.7; +1 more affected products

CVE-2025-40258 affects azl3 kernel 6.6.112.1-2 on Azure Linux 3.0. CVSS 3.1 base score 9.8 (CRITICAL, Source advisory). EPSS 0.00464 (percentile 0.38889), scored 19-Oct-2026.

Affected technology

Linux · 3b1d6210a9577369103330b0d802b0bf74b65e7f to before f865e6595acf33083168db76921e66ace8bf0e5b, 3b1d6210a9577369103330b0d802b0bf74b65e7f to before 99908e2d601236842d705d5fd04fb349577316f5, 3b1d6210a9577369103330b0d802b0bf74b65e7f to before db4f7968a75250ca6c4ed70d0a78beabb2dcee18, 3b1d6210a9577369103330b0d802b0bf74b65e7f to before 8f9ba1a99a89feef9b5867c15a0141a97e893309, 3b1d6210a9577369103330b0d802b0bf74b65e7f to before ac28dfddedf6f209190950fc71bcff65ec4ab47b, 3b1d6210a9577369103330b0d802b0bf74b65e7f to before 3fc7723ed01d1130d4bf7063c50e0af60ecccbb4, 3b1d6210a9577369103330b0d802b0bf74b65e7f to before 035bca3f017ee9dea3a5a756e77a6f7138cc6eea
Linux

Linux · 5.7
Linux

RUGGEDCOM RST2428P · 0 to before V4.0
Siemens

Component: Not specified by the source
File: net/mptcp/protocol.c

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

What an attacker can do

Source advisory’s CVSS 3.1 assessment (base score 9.8/10) rates confidentiality, integrity and availability impact as high. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 20-Oct-2026 01:47 UTC

Product: azl3 kernel 6.6.112.1-2 on Azure Linux 3.0
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: 0.00464 · percentile 0.38889 · 2026-10-19
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-19 14:17:18.977832+00:00 UTC
Microsoft MSRC Security Update Guide (CVRF) · Source record · observed 2026-10-04 07:08:49.022374+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-20 01:44:01.123206+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2025-40258.html