How severe is CVE-2019-12779?

CVE-2019-12779 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2019-12779 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-12779?

CVE-2019-12779 affects Clusterlabs Libqb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-12779?

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-2019-12779 published?

CVE-2019-12779 was published on 2019-06-07 and last updated on 2026-06-17.

CVE-2019-12779

CVE-2019-12779 is a high-severity vulnerability in Clusterlabs Libqb with a CVSS 3.x base score of 7.1. 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-59.

Key facts

Severity: High (CVSS 3.x base score 7.1)
CVSS v2: 6.6
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-59
Affected product: Clusterlabs Libqb
Published: 2019-06-07
Last modified: 2026-06-17

Description

libqb before 1.0.5 allows local users to overwrite arbitrary files via a symlink attack, because it uses predictable filenames (under /dev/shm and /tmp) without O_EXCL.

Frequently asked questions

What is CVE-2019-12779?: libqb before 1.0.5 allows local users to overwrite arbitrary files via a symlink attack, because it uses predictable filenames (under /dev/shm and /tmp) without O_EXCL.
How severe is CVE-2019-12779?: CVE-2019-12779 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2019-12779 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-12779?: CVE-2019-12779 affects Clusterlabs Libqb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-12779?: 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-2019-12779 published?: CVE-2019-12779 was published on 2019-06-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:clusterlabs:libqb:*:*:*:*:*:*:*:*

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