How severe is CVE-2019-15165?

CVE-2019-15165 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2019-15165 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-15165?

CVE-2019-15165 primarily affects Tcpdump Libpcap. In total, 26 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-15165?

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

When was CVE-2019-15165 published?

CVE-2019-15165 was published on 2019-10-03 and last updated on 2026-06-17.

CVE-2019-15165

CVE-2019-15165 is a medium-severity vulnerability in Tcpdump Libpcap with a CVSS 3.x base score of 5.3. 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-770.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-770
Affected product: Tcpdump Libpcap
Published: 2019-10-03
Last modified: 2026-06-17

Description

sf-pcapng.c in libpcap before 1.9.1 does not properly validate the PHB header length before allocating memory.

Frequently asked questions

What is CVE-2019-15165?: sf-pcapng.c in libpcap before 1.9.1 does not properly validate the PHB header length before allocating memory.
How severe is CVE-2019-15165?: CVE-2019-15165 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2019-15165 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-15165?: CVE-2019-15165 primarily affects Tcpdump Libpcap. In total, 26 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-15165?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-15165 published?: CVE-2019-15165 was published on 2019-10-03 and last updated on 2026-06-17.

References

Affected products (26)

cpe:2.3:a:tcpdump:libpcap:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_operations_monitor:3.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_operations_monitor:4.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_operations_monitor:4.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_operations_monitor:4.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_operations_monitor:4.3:*:*:*:*:*:*:*
cpe:2.3:o:apple:ipados:13.3:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:13.3:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.13.6:security_update_2019-007:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-002:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.15.2:*:*:*:*:*:*:*
cpe:2.3:o:apple:tvos:13.3:*:*:*:*:*:*:*
cpe:2.3:o:apple:watchos:6.1.1:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*

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CVE-2011-1935 — Critical (CVSS 9.8): pcap-linux.c in libpcap 1.1.1 before commit ea9432fabdf4b33cbc76d9437200e028f1c47c93 when snaplen is set may truncate…
CVE-2019-15163 — High (CVSS 7.5): rpcapd/daemon.c in libpcap before 1.9.1 allows attackers to cause a denial of service (NULL pointer dereference and…
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CVE-2019-15162 — Medium (CVSS 5.3): rpcapd/daemon.c in libpcap before 1.9.1 on non-Windows platforms provides details about why authentication failed,…
CVE-2019-15161 — Medium (CVSS 5.3): rpcapd/daemon.c in libpcap before 1.9.1 mishandles certain length values because of reuse of a variable. This may open…
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