PatchTheCVECVE-2020-23914: An issue was discovered in cpp-peglib through v0.1.12
CVE-2020-23914 is a medium-severity flaw (CVSS 5.5) affecting cpp-peglib. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.
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 | None |
| User interaction | Required |
| EPSS exploit chance | 0.9% (top 41%) |
| CISA exploited list | No |
| Weakness | CWE-476 |
| Published | 2021-04-21 |
| 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-2020-23914?
cpp-peglib: upgrade to newer than 0.1.12. Exact commands for each OS are on this page.
Is CVE-2020-23914 being exploited?
CVE-2020-23914 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-2020-23914 affect?
CVE-2020-23914 affects cpp-peglib. Severity is medium (CVSS 5.5). An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.
How urgent is CVE-2020-23914?
Priority 39/100. Public exploit reference
Related CVEs
- CVE-2020-23915 MEDIUM 5.5 UPGRADE An issue was discovered in cpp-peglib through v0.1.12