PatchTheCVECVE-2021-44421: The pointer-validation logic in util/mem_util.rs in Occlum before 0.26.0 for Intel SGX acts as a confused depu
CVE-2021-44421 is a medium-severity flaw (CVSS 5.5) affecting occlum. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.5 (Medium) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 62%) |
| CISA exploited list | No |
| Weakness | CWE-203 |
| Published | 2022-03-10 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-44421?
occlum: upgrade to 0.26.0. Exact commands for each OS are on this page.
Is CVE-2021-44421 being exploited?
CVE-2021-44421 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-44421 affect?
CVE-2021-44421 affects occlum. Severity is medium (CVSS 5.5). 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.
How urgent is CVE-2021-44421?
Priority 34/100. Public exploit reference