What’s Vulnerable › Vulnerabilities

CVE-2026-22188: Panda3D <= 1.10.16 Deploy-Stub Stack Exhaustion via Unbounded alloca()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-07 · updated 2026-07-14
• Weakness: CWE-457

Description

The deploy-stub component in Panda3D versions up to and including 1.10.16 contains a denial of service vulnerability due to unbounded stack allocation. The deploy-stub executable allocates argv_copy and argv_copy2 using alloca() based directly on the attacker-controlled argc value without validation. Supplying a large number of command-line arguments can exhaust stack space and propagate uninitialized stack memory into Python interpreter initialization, resulting in a reliable crash and undefined behavior.

Affected products

• Panda3D: through 1.10.16

References

• https://github.com/panda3d/panda3d
• https://seclists.org/fulldisclosure/2026/Jan/9
• https://www.panda3d.org/
• https://www.vulncheck.com/advisories/panda3d-deploy-stub-stack-exhaustion-via-unbounded-alloca

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