CVE-2026-89476

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-89476

Key Details

CVE	CVE-2026-89476
CVSS Score / Version	7.5 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 none; integrity impact is none; 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: fix stream->outcnt underflow on duplicate RECONF responses

A cached RECONF chunk may contain more than one request parameter. A

duplicate response can therefore find and process the same ADD_OUT request

again while another parameter is still outstanding, rolling back outcnt

twice and possibly underflowing it.

Track outstanding request types as bits and clear each bit after its first

response. Later responses for the same request are then ignored. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-89476
CVE	https://www.cve.org/CVERecord?id=CVE-2026-89476

Source

Reference

NVD

CVE