How severe is CVE-2016-1882?

CVE-2016-1882 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-2016-1882 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-1882?

CVE-2016-1882 primarily affects Freebsd. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-1882?

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-2016-1882 published?

CVE-2016-1882 was published on 2016-01-29 and last updated on 2026-06-17.

CVE-2016-1882

CVE-2016-1882 is a high-severity vulnerability in Freebsd 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-19.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.8
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-19
Affected product: Freebsd
Published: 2016-01-29
Last modified: 2026-06-17

Description

FreeBSD 9.3 before p33, 10.1 before p26, and 10.2 before p9 allow remote attackers to cause a denial of service (kernel crash) via vectors related to creating a TCP connection with the TCP_MD5SIG and TCP_NOOPT socket options.

Frequently asked questions

What is CVE-2016-1882?: FreeBSD 9.3 before p33, 10.1 before p26, and 10.2 before p9 allow remote attackers to cause a denial of service (kernel crash) via vectors related to creating a TCP connection with the TCP_MD5SIG and TCP_NOOPT socket options.
How severe is CVE-2016-1882?: CVE-2016-1882 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-2016-1882 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-1882?: CVE-2016-1882 primarily affects Freebsd. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-1882?: 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-2016-1882 published?: CVE-2016-1882 was published on 2016-01-29 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:o:freebsd:freebsd:9.3:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:10.1:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:10.2:*:*:*:*:*:*:*

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