CVE-2021-22548: Arbitrary enclave memory overread vulnerability in Asylo TrustedPrimitives::UntrustedCall

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-06-08 · updated 2026-06-17
Weakness: CWE-788

Description

An attacker can change the pointer to untrusted memory to point to trusted memory region which causes copying trusted memory to trusted memory, if the latter is later copied out, it allows for reading of memory regions from the trusted region. It is recommended to update past 0.6.2 or git commit https://github.com/google/asylo/commit/53ed5d8fd8118ced1466e509606dd2f473707a5c

Affected products

Google LLC Asylo: before 0.6.2 — fixed in 0.6.2

How to fix

Upgrade to a fixed version: Google LLC Asylo 0.6.2. Check the vendor advisory for mitigations.

References

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