PatchTheCVECVE-2019-18874: psutil (aka python-psutil) through 5.6.5 can have a double free
CVE-2019-18874 is a high-severity flaw (CVSS 7.5) affecting psutil. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
psutil (aka python-psutil) through 5.6.5 can have a double free. This occurs because of refcount mishandling within a while or for loop that converts system data into a Python object.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 3.5% (top 11%) |
| CISA exploited list | No |
| Weakness | CWE-415 |
| Published | 2019-11-12 |
| 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-2019-18874?
psutil: upgrade to newer than 5.6.5. Exact commands for each OS are on this page.
Is CVE-2019-18874 being exploited?
CVE-2019-18874 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-2019-18874 affect?
CVE-2019-18874 affects psutil. Severity is high (CVSS 7.5). psutil (aka python-psutil) through 5.6.5 can have a double free. This occurs because of refcount mishandling within a while or for loop that converts system data into a Python object.
How urgent is CVE-2019-18874?
Priority 54/100. High severity; Remotely exploitable, no login, no user action