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 argvcopy and argvcopy2 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 Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Panda3D deploy-stubto a version that resolves this vulnerability.Fixed in 1.10.16
Event History
Frequently Asked Questions
What is the severity of CVE-2026-22188?
CVE-2026-22188 has a severe denial of service vulnerability due to unbounded stack allocation.
How does CVE-2026-22188 affect Panda3D users?
CVE-2026-22188 affects users of Panda3D versions up to and including 1.10.16, allowing potential denial of service attacks.
How do I fix CVE-2026-22188?
To fix CVE-2026-22188, users should upgrade to a version of Panda3D that is higher than 1.10.16.
What is the cause of CVE-2026-22188?
CVE-2026-22188 is caused by the deploy-stub executable's use of unvalidated attacker-controlled argc for stack allocation.
Can CVE-2026-22188 be exploited remotely?
Yes, CVE-2026-22188 can potentially be exploited remotely if an attacker can manipulate input to the vulnerable deploy-stub.