CVE-2021-44421

The pointer-validation logic in util/mem_util.rs in Occlum before 0.26.0 for Intel SGX acts as a...

5.5 Medium

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.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

0.44%Down 0.5 points since Mar 7, 2022

What each source reports

NVD Score used 5.5

Record: CVE-2021-44421
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0: 2.1 LowAV:L/AC:L/Au:N/C:P/I:N/A:N
Weakness: CWE-203
Updated: 2026-11-02

CVE List No score

Record: CVE-2021-44421
Updated: 2026-11-02

EUVDEUVD-2021-31262 No score

Record: EUVD-2021-31262
Updated: 2026-11-03

GitHub AdvisoriesGHSA-pj6m-jc6g-72c4 5.5

The pointer-validation logic in util/mem_util.rs in Occlum before 0.26.0 for Intel SGX acts as a...

Record: GHSA-pj6m-jc6g-72c4
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-203
Updated: 2026-11-02

OSV 5.5

Record: CVE-2021-44421
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

Affected products

occlum project occlum

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-44421 is a medium vulnerability (CVSS 5.5) in Occlum Project Occlum, published March 6, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.44%, the 38th percentile. No source names a fixed version.