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The CVE-2025-???? vulnerability in OpenUSD arises from a use-after-free (UAF) flaw within its file parsing component. When a maliciously crafted USD file is processed, the importer fails to properly manage memory for specific data structures. An attacker can design a file that triggers the premature deallocation (freeing) of a heap-based buffer. However, the application’s code retains a “dangling” pointer that continues to reference the now-freed memory location. Subsequent operations within the importer, which rely on the valid state of this data, use this stale pointer. This leads to the reading of unpredictable or attacker-controlled data from the reallocated memory, potentially corrupting application logic. In a sophisticated exploit, this memory corruption can be leveraged to achieve arbitrary code execution in the context of the application parsing the file.
Platform: OpenUSD
Version: Pre 25.11
Vulnerability: Use-After-Free
Severity: Moderate
date: 2025-10-29
Prediction: Patch 2025-11-01
What Undercode Say:
Build OpenUSD with AddressSanitizer to detect the issue cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_CXX_FLAGS="-fsanitize=address" .. make Run the importer with the malicious file to trigger the UAF usdview ZDI-CAN-23709.usda
// Code snippet illustrating the UAF concept
class UsdData {
public:
void freeResource() { delete[] buffer; buffer = nullptr; }
char buffer;
};
void parseMaliciousFile(UsdData data) {
data->freeResource(); // Buffer is freed
// ... attacker-induced logic makes 'data' persist ...
print(data->buffer); // Use-after-Free occurs here
}
How Exploit:
Craft malicious USD file. Distribute via email, web. Parse with vulnerable OpenUSD. UAF corrupts memory. Execute shellcode.
Protection from this CVE
Update to OpenUSD 25.11. Sanitize inputs. Use memory sanitizers. Avoid untrusted USD files.
Impact:
Arbitrary Code Execution. Application Crash. Denial of Service.
🎯Let’s Practice Exploiting & Learn Patching For Free:
Sources:
Reported By: github.com
Extra Source Hub:
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