CVE-2026-71968 OP-TEE OS 4.10.0 Use-After-Free via Trusted Application Loader TA_FLAG_CONCURRENT
Attackers with signed TA loading capabilities can corrupt secure-world kernel memory via a use-after-free in the TA loader, potentially leading to code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-71968?
CVE-2026-71968 is a high-severity use after free vulnerability in OP-TEE optee_os, published on 10 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-71968?
How do I fix CVE-2026-71968?
No fix has been published for CVE-2026-71968 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-71968 being exploited?
There is no known exploitation of CVE-2026-71968 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-71968, GHSA-p84g-83m7-53p6, UBUNTU-CVE-2026-71968.