CVE-2026-22188

Panda3D <= 1.10.16 Deploy-Stub Stack Exhaustion via Unbounded alloca()

State: Published
Severity: 6.9 Medium
Published: Jan 7, 2026
Updated: Jul 14, 2026
Reserved: Jan 6, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	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	VulnCheck

Weaknesses

CWE-457 Use of Uninitialized Variable
CWE-789 Memory Allocation with Excessive Size Value

Affected Products

Product	Versions
Panda3DPanda3D	1.10.16 and earlierAffected

References

https://seclists.org/fulldisclosure/2026/Jan/9technical-descriptionexploit
https://www.panda3d.org/product
https://github.com/panda3d/panda3dproduct
https://www.vulncheck.com/advisories/panda3d-deploy-stub-stack-exhaustion-via-unbounded-allocathird-party-advisory

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