PatchTheCVECVE-2021-39536: An issue was discovered in libxsmm through v1.16.1-93
CVE-2021-39536 is a high-severity flaw (CVSS 8.8) affecting libxsmm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
An issue was discovered in libxsmm through v1.16.1-93. The JIT code has a heap-based buffer overflow.
Why this priority
- High severity
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.8 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 1.1% (top 35%) |
| CISA exploited list | No |
| Weakness | CWE-787 |
| Published | 2021-09-20 |
| 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-2021-39536?
libxsmm: upgrade to newer than 1.16.1. Exact commands for each OS are on this page.
Is CVE-2021-39536 being exploited?
CVE-2021-39536 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-2021-39536 affect?
CVE-2021-39536 affects libxsmm. Severity is high (CVSS 8.8). An issue was discovered in libxsmm through v1.16.1-93. The JIT code has a heap-based buffer overflow.
How urgent is CVE-2021-39536?
Priority 52/100. High severity; Public exploit reference
Related CVEs
- CVE-2021-39535 MEDIUM 6.5 UPGRADE An issue was discovered in libxsmm through v1.16.1-93