How severe is CVE-2019-18874?

CVE-2019-18874 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2019-18874 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-18874?

CVE-2019-18874 affects Psutil Project Psutil. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-18874?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-18874 published?

CVE-2019-18874 was published on 2019-11-12 and last updated on 2026-06-17.

CVE-2019-18874

CVE-2019-18874 is a high-severity vulnerability in Psutil Project Psutil with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-415.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-415
Affected product: Psutil Project Psutil
Published: 2019-11-12
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2019-18874?: 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 severe is CVE-2019-18874?: CVE-2019-18874 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2019-18874 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-18874?: CVE-2019-18874 affects Psutil Project Psutil. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-18874?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-18874 published?: CVE-2019-18874 was published on 2019-11-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:psutil_project:psutil:*:*:*:*:*:*:*:*

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