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CVE-2026-41434 OP-TEE CVE debrief

A low-severity vulnerability was found in OP-TEE, a Trusted Execution Environment (TEE) designed for Arm Cortex-A cores using TrustZone technology. The issue, tracked as CVE-2026-41434, allows an unbounded recursion that can crash the PKCS#11 TA. The vulnerability was introduced in version 3.10.0 and was patched in version 4.11.0. The vulnerability has a CVSS score of 3.3, indicating a low severity. Organizations using OP-TEE should review their deployments and apply the patch provided in version 4.11.0.

Vendor
OP-TEE
Product
optee_os
CVSS
LOW 3.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-06
Original CVE updated
2026-07-07
Advisory published
2026-07-06
Advisory updated
2026-07-07

Who should care

Organizations using OP-TEE versions between 3.10.0 and 4.10.0 should apply the patch provided in version 4.11.0 to prevent potential crashes of the PKCS#11 TA. Security teams and vulnerability management teams should review their deployments and apply the patch as necessary.

Technical summary

CVE-2026-41434 is a low-severity vulnerability in OP-TEE, a Trusted Execution Environment (TEE) for Arm Cortex-A cores. The issue is caused by an unbounded recursion that can crash the PKCS#11 TA. The vulnerability was introduced in version 3.10.0 and patched in version 4.11.0. The CVSS score is 3.3, indicating a low severity. The vulnerability affects OP-TEE versions between 3.10.0 and 4.10.0. Organizations should review their deployments and apply the patch provided in version 4.11.0 to prevent potential crashes of the PKCS#11 TA. Security teams should verify the patch application and monitor systems for unusual behavior.

Defensive priority

Apply the patch provided in OP-TEE version 4.11.0 to prevent potential crashes of the PKCS#11 TA. Review and update vulnerability management processes to ensure timely application of patches for OP-TEE deployments.

Recommended defensive actions

  • Apply the patch provided in OP-TEE version 4.11.0
  • Inventory OP-TEE installations to identify potentially vulnerable versions
  • Monitor OP-TEE systems for crashes or unusual behavior
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record was published on 2026-07-06T18:16:43.923Z and last modified on 2026-07-07T18:53:03.177Z. The NVD entry is currently Analyzed. The vulnerability affects OP-TEE versions between 3.10.0 and 4.10.0. There are no known workarounds available. The CVE record was created based on information from the official CVE record and the NVD entry.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-41434 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-41434

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-41434 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-41434

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.