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CVE-2026-34347 is a local elevation-of-privilege vulnerability in the Windows Win32K GRFX kernel graphics component. The flaw is a use-after-free condition in which a kernel-mode graphics object continues to be referenced after its backing memory has been freed, creating a dangling pointer. Under successful exploitation, this stale reference can be leveraged to corrupt kernel memory. The vulnerability is exploitable by an authenticated local attacker with low privileges and does not require user interaction. Microsoft assessed exploitation as less likely because reliable exploitation requires winning a race condition. Successful exploitation can result in escalation from a standard user context to SYSTEM.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A local privilege escalation vulnerability in the Windows Win32K GRFX kernel graphics component caused by a use-after-free condition that can allow a low-privileged local user to gain SYSTEM privileges.
A Windows Win32k use-after-free elevation of privilege vulnerability in Win32K-GRFX that allows a locally authorized attacker to gain elevated privileges, potentially up to SYSTEM.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.