PatchTheCVECVE-2023-52339: In libebml before 1.4.5, an integer overflow in MemIOCallback.cpp can occur when reading or writing
CVE-2023-52339 is a medium-severity flaw (CVSS 6.5) affecting libebml. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
In libebml before 1.4.5, an integer overflow in MemIOCallback.cpp can occur when reading or writing. It may result in buffer overflows.
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 1.1% (top 34%) |
| CISA exploited list | No |
| Weakness | CWE-190 |
| Published | 2024-01-12 |
| 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-2023-52339?
libebml: upgrade to 1.4.5. Exact commands for each OS are on this page.
Is CVE-2023-52339 being exploited?
CVE-2023-52339 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-2023-52339 affect?
CVE-2023-52339 affects libebml. Severity is medium (CVSS 6.5). In libebml before 1.4.5, an integer overflow in MemIOCallback.cpp can occur when reading or writing. It may result in buffer overflows.
How urgent is CVE-2023-52339?
Priority 44/100. Public exploit reference