CVE-2026-74752

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-74752

Key Details

CVE	CVE-2026-74752
CVSS Score / Version	9.8 (Critical) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

In the Linux kernel, the following vulnerability has been resolved:

sctp: validate cookie AUTH state before use

When cookie authentication is disabled, COOKIE_ECHO restores fixed-size

AUTH fields directly from peer-controlled cookie bytes. A forged RANDOM

length, HMAC list, or CHUNKS list can then reach association consumers

with lengths or identifiers that were never validated against the local

backing arrays.

A forged RANDOM length can cause out-of-bounds reads during key-vector

construction. A forged HMAC identifier also caused a 32-byte write past

a zero-length AUTH chunk, providing a primitive for a local privilege

escalation chain.

Validate the cookie's RANDOM, HMACS, and CHUNKS parameters at the cookie

trust boundary before copying them into the association. Reject invalid

types, malformed lengths, unsupported HMAC identifiers, HMAC lists

without SHA1, and forbidden chunk ids. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-74752
CVE	https://www.cve.org/CVERecord?id=CVE-2026-74752

Source

Reference

NVD

CVE