How severe is CVE-2019-5605?

CVE-2019-5605 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2019-5605 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-5605?

CVE-2019-5605 primarily affects Freebsd. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-5605?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-5605 published?

CVE-2019-5605 was published on 2019-07-26 and last updated on 2026-06-17.

CVE-2019-5605

CVE-2019-5605 is a medium-severity vulnerability in Freebsd with a CVSS 3.x base score of 6.5. 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-665.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 6.8
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-665
Affected product: Freebsd
Published: 2019-07-26
Last modified: 2026-06-17

Description

In FreeBSD 11.3-STABLE before r350217, 11.3-RELEASE before 11.3-RELEASE-p1, and 11.2-RELEASE before 11.2-RELEASE-p12, due to insufficient initialization of memory copied to userland in the freebsd32_ioctl interface, small amounts of kernel memory may be disclosed to userland processes. This may allow an attacker to leverage this information to obtain elevated privileges either directly or indirectly.

Frequently asked questions

What is CVE-2019-5605?: In FreeBSD 11.3-STABLE before r350217, 11.3-RELEASE before 11.3-RELEASE-p1, and 11.2-RELEASE before 11.2-RELEASE-p12, due to insufficient initialization of memory copied to userland in the freebsd32_ioctl interface, small amounts of kernel memory may be disclosed to userland processes. This may allow an attacker to leverage this information to obtain elevated privileges either directly or indirectly.
How severe is CVE-2019-5605?: CVE-2019-5605 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2019-5605 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-5605?: CVE-2019-5605 primarily affects Freebsd. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-5605?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-5605 published?: CVE-2019-5605 was published on 2019-07-26 and last updated on 2026-06-17.

References

Affected products (14)

cpe:2.3:o:freebsd:freebsd:11.0:-:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.2:-:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.2:p10:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.2:p11:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.2:p2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.2:p3:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.2:p4:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.2:p5:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.2:p6:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.2:p7:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.2:p8:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.2:p9:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.2:rc3:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.3:-:*:*:*:*:*:*

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