How severe is CVE-2011-1935?

CVE-2011-1935 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2011-1935 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-1935?

CVE-2011-1935 affects Tcpdump Libpcap. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-1935?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2011-1935 published?

CVE-2011-1935 was published on 2017-10-20 and last updated on 2026-06-16.

CVE-2011-1935

CVE-2011-1935 is a critical-severity vulnerability in Tcpdump Libpcap with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Tcpdump Libpcap
Published: 2017-10-20
Last modified: 2026-06-16

Description

pcap-linux.c in libpcap 1.1.1 before commit ea9432fabdf4b33cbc76d9437200e028f1c47c93 when snaplen is set may truncate packets, which might allow remote attackers to send arbitrary data while avoiding detection via crafted packets.

Frequently asked questions

What is CVE-2011-1935?: pcap-linux.c in libpcap 1.1.1 before commit ea9432fabdf4b33cbc76d9437200e028f1c47c93 when snaplen is set may truncate packets, which might allow remote attackers to send arbitrary data while avoiding detection via crafted packets.
How severe is CVE-2011-1935?: CVE-2011-1935 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2011-1935 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1935?: CVE-2011-1935 affects Tcpdump Libpcap. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-1935?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2011-1935 published?: CVE-2011-1935 was published on 2017-10-20 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:tcpdump:libpcap:*:*:*:*:*:*:*:*

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