CVE-2026-68376

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-68376

Key Details

CVE	CVE-2026-68376
CVSS Score / Version	8.1 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is network; attack complexity is high; 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: fix auth_hmacs array size in struct sctp_cookie

The auth_hmacs array in struct sctp_cookie is supposed to store a complete

SCTP_AUTH_HMAC_ALGO parameter, which consists of a struct sctp_paramhdr

followed by N HMAC identifiers.

However, the array size was calculated using an extra 2 bytes instead of

sizeof(struct sctp_paramhdr), which is 4 bytes. When four HMAC identifiers

are configured, the HMAC-ALGO parameter stored in the endpoint is larger

than the auth_hmacs buffer in the cookie.

As a result, sctp_association_init() copies beyond the end of auth_hmacs

when initializing the association, corrupting the adjacent auth_chunks

field. This can lead to an invalid HMAC identifier being accepted and later

cause an out-of-bounds read in sctp_auth_get_hmac().

Fix the array size calculation by including the full SCTP parameter header

size. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-68376
CVE	https://www.cve.org/CVERecord?id=CVE-2026-68376

Source

Reference

NVD

CVE