How severe is CVE-2019-19520?

CVE-2019-19520 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-19520 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-19520?

CVE-2019-19520 affects Openbsd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-19520?

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-2019-19520 published?

CVE-2019-19520 was published on 2019-12-05 and last updated on 2026-06-17.

CVE-2019-19520

CVE-2019-19520 is a high-severity vulnerability in Openbsd with a CVSS 3.x base score of 7.8. 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-863.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.6
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Openbsd
Published: 2019-12-05
Last modified: 2026-06-17

Description

xlock in OpenBSD 6.6 allows local users to gain the privileges of the auth group by providing a LIBGL_DRIVERS_PATH environment variable, because xenocara/lib/mesa/src/loader/loader.c mishandles dlopen.

Frequently asked questions

What is CVE-2019-19520?: xlock in OpenBSD 6.6 allows local users to gain the privileges of the auth group by providing a LIBGL_DRIVERS_PATH environment variable, because xenocara/lib/mesa/src/loader/loader.c mishandles dlopen.
How severe is CVE-2019-19520?: CVE-2019-19520 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-19520 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-19520?: CVE-2019-19520 affects Openbsd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-19520?: 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-2019-19520 published?: CVE-2019-19520 was published on 2019-12-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:openbsd:openbsd:6.6:*:*:*:*:*:*:*

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