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CVE-2021-22552

Memory overread secure enclave in Asylo 0.6.2

MEDIUM
5.5
CVSS Score
Published: August 2, 2021 at 03:40 PM UTC
Updated: June 17, 2026 at 03:37 AM UTC
1 product affected across 1 vendorAsylo

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%

Description

An untrusted memory read vulnerability in Asylo versions up to 0.6.1 allows an untrusted attacker to pass a syscall number in MessageReader that is then used by sysno() and can bypass validation. This can allow the attacker to read memory from within the secure enclave. We recommend updating to Asylo 0.6.3 or past https://github.com/google/asylo/commit/90d7619e9dd99bcdb6cd28c7649d741d254d9a1a

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Asylo· Google
95%
v ≤ 0.6.1v ≤ 0.6.2

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_MISCExploitPatchThird Party Advisory
Source: [email protected]
https://github.com/google/asylo/commit/90d7619e9dd99bcdb6cd28c7649d741d254d9a1a

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-126CWE-125

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