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CVE-2026-10007 is a Use After Free (UAF) vulnerability in Google Chrome’s handling of SVG (Scalable Vector Graphics) content. The flaw resides in the browser’s SVG rendering engine, specifically in how it manages the lifetime of certain objects when processing crafted HTML pages. When Chrome parses an SVG, it allocates memory for various graphical components. Under normal conditions, these objects are properly dereferenced and memory is freed. However, due to a missing reference count or a dangling pointer, an attacker can trigger a UAF condition. This occurs when a script creates an SVG element, causes its memory to be freed, and then subsequently references that same memory location through a different, still‑active API. Because the pointer is not nullified after the free, the browser continues to treat the freed memory as a live object. An attacker can exploit this by spraying the heap with controlled data before the UAF, thereby replacing the original object’s virtual table (vtable) or its data payload. Once the UAF is triggered, the browser calls methods on the dangling pointer, redirecting execution to attacker‑supplied code. This technique allows the attacker to break out of the sandbox and achieve arbitrary code execution. The attack vector is a remote HTML page, requiring only that the victim browses to a malicious site or opens a crafted file. The vulnerability is classified as High severity because it bypasses Chrome’s sandbox protections, leading to full remote code execution on the user’s machine. The fix in version 148.0.7778.216 involves adding proper reference counting and nullifying the pointer after the object is freed, ensuring no stale references remain.
DailyCVE Form:
Platform: Google Chrome
Version: <148.0.7778.216
Vulnerability: Use After Free
Severity: High
date: 2026-05-28
Prediction: 2026-05-28
What Undercode Say:
Check Chrome version google-chrome --version Update Chrome on Debian/Ubuntu sudo apt update && sudo apt upgrade google-chrome-stable Update Chrome on macOS /Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --version Block vulnerable code (example WAF rule) SecRule REQUEST_URI ".svg" "id:10007,deny,status:403,msg:'SVG UAF attempt'"
<!-- Proof of concept: trigger UAF via SVG -->
<svg id="x" onload="f()">
<path d="M0,0 L10,10"/>
</svg>
<script>
function f() {
let svg = document.getElementById('x');
// Free object via GC
svg.remove();
// Trigger UAF by accessing freed memory
svg.getBoundingClientRect();
}
</script>
Exploit:
A remote attacker hosts a malicious HTML page containing specially crafted SVG elements. The page uses JavaScript to allocate and free SVG objects in a specific order, creating a race condition. By spraying the heap with data that mimics a valid vtable, the attacker can hijack control flow and execute shellcode. The exploit typically begins with a memory leak to defeat ASLR, followed by a ROP chain that disables the sandbox and spawns a reverse shell.
Protection:
- Update Google Chrome to version 148.0.7778.216 or later.
- Enable automatic updates in Chrome.
- Use browser isolation or sandboxing tools to limit exposure.
- Disable JavaScript on untrusted sites (e.g., via NoScript).
- Apply vendor patches as soon as they are available.
Impact:
Successful exploitation allows an attacker to execute arbitrary code within the context of the browser, escaping the sandbox. This can lead to full system compromise, including data theft, installation of malware, or remote control of the affected machine. The vulnerability requires no special privileges, only that the user visits a malicious website or opens a crafted file.
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Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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