CVE-2026-41434 OP-TEE has unbounded recursion in sanitize_client_object()

What is CVE-2026-41434?

CVE-2026-41434 is a low-severity denial of service vulnerability in OP-TEE optee_os, published on 6 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. Starting in version 3.10.0 and prior to version 4.11.0, an unbounded recursion can crash the PKCS#11 TA. Version 4.11.0 contains a patch. No known workarounds are available.

Weakness: CWE-121

Which versions are affected by CVE-2026-41434?

It affects 1 product.

Products include Trustedfirmware Op-Tee.

How do I fix CVE-2026-41434?

No fix has been published for CVE-2026-41434 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-41434 being exploited?

There is no known exploitation of CVE-2026-41434 in the wild and no public exploit code.

Other vulnerabilities in OP-TEE optee_os

• CVE-2019-1010292 Memory corruption in OP-TEE Critical 9.8
• CVE-2019-1010293 Memory corruption in OP-TEE Critical 9.8
• CVE-2019-1010295 Linaro/OP-TEE OP-TEE 3.3.0 and earlier is affected by: Buffer Overflow. Critical 9.8
• CVE-2019-1010296 Memory corruption in OP-TEE Critical 9.8
• CVE-2019-1010297 Memory corruption in OP-TEE Critical 9.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2026-41434, GHSA-wh38-23ff-grff, UBUNTU-CVE-2026-41434.