CVE-2026-22188

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

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

Panda3D

CVSS v4.0 VULNCHECK

6.9 MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 NVD

5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.21% chance of exploitation in the next 30 days, 10th percentile

Published

2026-01-07

Updated

2026-07-14

Proof-of-concept exploits (1)

• https://seclists.org/fulldisclosure/2026/Jan/9

Security advisories

• https://www.vulncheck.com/advisories/panda3d-deploy-stub-stack-exhaustion-via-unbounded-a…
• panda3d/panda3d
• https://www.panda3d.org

References

• CVE Record
• NVD entry