CVE-2021-44421
MEDIUM
5.5
CVSS Score
Published: March 6, 2022 at 08:03 PM UTC
Updated: June 17, 2026 at 04:12 AM UTC
1 product affected across 1 vendorOcclum
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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.4%
Description
The pointer-validation logic in util/mem_util.rs in Occlum before 0.26.0 for Intel SGX acts as a confused deputy that allows a local attacker to access unauthorized information via side-channel analysis.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 0.26.0
Affected range stops below 0.26.0, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (4)
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/src/libos/src/util/mem_util.rs#L130x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://github.com/occlum/occlum/blob/821ea843ae21037e6cff5268306d2da1fb131552/src/libos/src/util/mem_util.rs#L51x_refsource_CONFIRMPatchThird Party Advisory
Source: [email protected]
https://github.com/occlum/occlum/commit/36918e42bf6732c4d3996bc99eb013eb6b90b249x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://github.com/occlum/occlum/compare/0.25.0...v0.26.0CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- NONE
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-203
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