PatchSiren cyber security CVE debrief

CVE-2026-22188 Panda3D CVE debrief

## Summary Panda3D's deploy-stub component (≤1.10.16) is vulnerable to denial of service via unbounded stack allocation. The component uses `alloca()` to create `argv_copy` and `argv_copy2` arrays sized directly by attacker-controlled `argc` without validation. A large number of command-line arguments exhausts stack space, causing crash and undefined behavior during Python interpreter initialization. ## Technical Details - **Affected Component**: deploy-stub executable in Panda3D - **Root Cause**: Unvalidated `alloca()` calls based on `argc` - **Attack Vector**: Local, via crafted command-line invocation - **Impact**: Denial of service (reliable crash), undefined behavior from uninitialized stack memory propagation ## Affected Versions Panda3D versions up to and including 1.10.16 ## CVSS 4.0 Assessment - **Score**: 6.9 (MEDIUM) - **Vector**: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N - **Key Metrics**: Local attack vector, no privileges required, high availability impact ## Weaknesses - **CWE-908** (Primary, NVD): Use of Uninitialized Resource - **CWE-457**: Use of Uninitialized Variable - **CWE-789**: Uncontrolled Memory Allocation ## Timeline - **Published**: 2026-01-07 - **Modified**: 2026-05-26 ## Recommended Actions 1. Upgrade to Panda3D version >1.10.16 when available 2. Validate and limit command-line argument count in wrapper scripts before invoking deploy-stub 3. Monitor for vendor security advisories from the Panda3D project 4. Apply principle of least privilege to limit exposure of deploy-stub executables ## References - CVE Record: CVE.org official record - NVD Entry: NIST National Vulnerability Database - Vendor Repository: Panda3D GitHub - Vendor Website: Panda3D official site - Full Disclosure: Seclists full disclosure mailing list - Third Party Advisory: VulnCheck advisory