What’s Vulnerable › Vulnerabilities

CVE-2020-8936: Arbitrary enclave memory overwrite vulnerability in ECall ecall_restore

• Severity: medium (CVSS 5.5 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: 2020-12-15 · updated 2026-06-17
• Weakness: CWE-125

Description

An arbitrary memory overwrite vulnerability in Asylo versions up to 0.6.0 allows an attacker to make a host call to UntrustedCall. UntrustedCall failed to validate the buffer range within sgx_params and allowed the host to return a pointer that was an address within the enclave memory. This allowed an attacker to read memory values from within the enclave.

Affected products

• Google LLC Asylo: through 0.6.0

References

• https://github.com/google/asylo/commit/83036fd841d33baa7e039f842d131aa7881fdcc2
• https://github.com/google/asylo/commit/83036fd841d33baa7e039f842d131aa7881fdcc2

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