CVE-2026-62840

Linux Kernel Elevation of Privilege Vulnerability

HIGH 7.0

At a glance

Source: NVD
EPSS: EPSS 0.21 % · percentile 11 (2026-10-28)
State: PUBLISHED
Published: 2026-10-13 20:37 UTC
Updated: 2026-10-29 15:17 UTC
Assigner: microsoft
NVD status: Awaiting Analysis

Description

Time-of-check time-of-use (toctou) race condition in Linux Kernel allows an authorized attacker to elevate privileges locally.

Weaknesses (CWE)

CWE-367 — TOCTOU Race Condition

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62840

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 7.0	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft
CVSS 3.1	HIGH 7.0	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H	NVD · secure@microsoft.com (Secondary)

European references

ENISA EUVD · EUVD-2026-100608
GCVE · GCVE-0-2026-62840

CERT-FR advisories

CERTFR-2026-AVI-1316 — Multiples vulnérabilités dans les produits Microsoft · cert.ssi.gouv.fr

Affected products

Product	Versions
Microsoft · Linux 3P (Third Party) Distros	affected 1.0.0 < 7.3

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD