PatchSiren

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

Vendor
Panda3D
Product
Unknown
CVSS
MEDIUM 6.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-01-07
Original CVE updated
2026-07-14
Advisory published
2026-01-07
Advisory updated
2026-07-14

Who should care

Organizations distributing Panda3D-based applications using deploy-stub packaging; developers building standalone Python applications with Panda3D; security teams monitoring game engine and Python runtime vulnerabilities.

Technical summary

The deploy-stub component in Panda3D ≤1.10.16 uses unvalidated `alloca()` calls based on attacker-controlled `argc`, enabling stack exhaustion and denial of service through crafted command-line arguments.

Defensive priority

medium

Recommended defensive actions

  • Upgrade to Panda3D version >1.10.16 when available
  • Validate and limit command-line argument count in wrapper scripts before invoking deploy-stub
  • Monitor for vendor security advisories from the Panda3D project
  • Apply principle of least privilege to limit exposure of deploy-stub executables

Evidence notes

Based on NVD CPE data with medium confidence. Vendor attribution to CMU (Carnegie Mellon University) per CPE criteria.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-22188 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-22188

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-22188 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-22188

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.