CVE-2026-64313

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-64313

Key Details

CVE	CVE-2026-64313
CVSS Score / Version	8.8 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is adjacent; 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
Classified as	CWE-190 (Integer Overflow or Wraparound)

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:

crypto: ecc - Fix carry overflow in vli multiplication

The carry flag calculation fails when r01.m_high is saturated

(0xFFFFFFFFFFFFFFFF) and addition of lower bits overflows.

The condition (r01.m_high < product.m_high) doesn't handle the case

where r01.m_high == product.m_high and an additional carry exists

from lower-bit overflow.

When commit 3c4b23901a0c ("crypto: ecdh - Add ECDH software support")

introduced crypto/ecc.c, it split the muladd() function in the

micro-ecc library into separate mul_64_64() and add_128_128() helpers.

It seems the check got lost in translation.

Add proper handling for this boundary by accounting for the carry

from the lower addition. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-64313
CVE	https://www.cve.org/CVERecord?id=CVE-2026-64313

Source

Reference

NVD

CVE