How severe is CVE-2014-3951?

CVE-2014-3951 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2014-3951 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-3951?

CVE-2014-3951 primarily affects Freebsd. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2014-3951?

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

When was CVE-2014-3951 published?

CVE-2014-3951 was published on 2014-08-21 and last updated on 2026-06-17.

CVE-2014-3951

CVE-2014-3951 is a medium-severity vulnerability in Freebsd with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Freebsd
Published: 2014-08-21
Last modified: 2026-06-17

Description

The HZ module in the iconv implementation in FreeBSD 10.0 before p6 and NetBSD allows context-dependent attackers to cause a denial of service (NULL pointer dereference) via a crafted argument to the iconv_open function. NOTE: this issue was SPLIT per ADT2 due to different vulnerability types. CVE-2014-5384 is used for the NULL pointer dereference.

Frequently asked questions

What is CVE-2014-3951?: The HZ module in the iconv implementation in FreeBSD 10.0 before p6 and NetBSD allows context-dependent attackers to cause a denial of service (NULL pointer dereference) via a crafted argument to the iconv_open function. NOTE: this issue was SPLIT per ADT2 due to different vulnerability types. CVE-2014-5384 is used for the NULL pointer dereference.
How severe is CVE-2014-3951?: CVE-2014-3951 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2014-3951 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-3951?: CVE-2014-3951 primarily affects Freebsd. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2014-3951?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2014-3951 published?: CVE-2014-3951 was published on 2014-08-21 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:freebsd:freebsd:10.0:*:*:*:*:*:*:*
cpe:2.3:o:netbsd:netbsd:*:*:*:*:*:*:*:*

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