Out-of-bounds read/write in Chrome WebGL ANGLE Vulkan backend
CVE-2026-4440 is a critical memory corruption vulnerability in Google Chrome's WebGL implementation, specifically in the ANGLE Vulkan backend, affecting Chrome versions prior to 146.0.7680.153. The issue is described as an out-of-bounds read and write reachable via a crafted HTML page. Supporting content indicates the root cause is a 32-bit integer overflow during texture buffer size calculation for texStorage3D() operations. A trigger example is a 4096×4096 RGBA8 texture array with 64 or more layers, where the computed size reaches 2^32 bytes and wraps to zero in a 32-bit accumulator. Subsequent operations in downstream paths, including copyImageDataToBuffer() in vk_helpers.cpp and a format-conversion path around TextureVk.cpp line 3176, can then read from or write past the allocated buffer. This makes the bug remotely reachable through malicious WebGL content rendered in the browser.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
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Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
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.
Recent activity
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Chrome WebGL out-of-bounds read/write vulnerability caused by a 32-bit integer overflow in ANGLE's Vulkan backend texture buffer size calculations, enabling GPU-process memory corruption and cross-process information disclosure on unpatched Chrome versions.
A critical out-of-bounds read/write vulnerability in Chrome's WebGL component that could enable remote code execution through crafted web content.
The version that knows your environment.
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.