Untrusted pointer dereference in Windows Kernel allows an authorized attacker to elevate privileges locally.
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Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-12. NVD baseline CVSS 7.8; sources differ by 0.0.
Untrusted pointer dereference in Windows Kernel allows an authorized attacker to elevate privileges locally.
May 12, 2026
May 26, 2026
Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40369These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.
Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
Full exploit code for CVE-2026-40369 - A Windows kernel arbitrary write vulnerability that allows browser sandbox escape from all browsers render process sandbox
Open source ↗See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-40369
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.
msrc
CWE-822