Vulnerability Description
OP-TEE OS through 4.10.0, fixed in commit 8794043, contains a use-after-free vulnerability in the Trusted Application loader that allows attackers with the ability to load a signed Trusted Application to corrupt secure-world kernel memory by setting the TA_FLAG_CONCURRENT flag in a user TA signed header. Attackers can cause two concurrent sessions to operate on the same shared context without locking, corrupting the uctx->vm_info.regions list during memref parameter mapping and unmapping to free vm_region nodes still in use, resulting in a use-after-free in S-EL1 secure-world kernel memory.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/OP-TEE/optee_os/commit/8794043c4065c26a2b8b1313794ba5ba5f06d2
- https://github.com/OP-TEE/optee_os/pull/7900
- https://www.vulncheck.com/advisories/op-tee-os-use-after-free-via-trusted-applic
FAQ
What is CVE-2026-71968?
CVE-2026-71968 is a vulnerability with a CVSS score of 6.7 (MEDIUM). OP-TEE OS through 4.10.0, fixed in commit 8794043, contains a use-after-free vulnerability in the Trusted Application loader that allows attackers with the ability to load a signed Trusted Application...
How severe is CVE-2026-71968?
CVE-2026-71968 has been rated MEDIUM with a CVSS base score of 6.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-71968?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.