How severe is CVE-2018-20001?

CVE-2018-20001 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-20001 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20001?

CVE-2018-20001 affects Libav. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20001?

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

When was CVE-2018-20001 published?

CVE-2018-20001 was published on 2018-12-10 and last updated on 2026-06-17.

CVE-2018-20001

CVE-2018-20001 is a medium-severity vulnerability in Libav 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-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Libav
Published: 2018-12-10
Last modified: 2026-06-17

Description

In Libav 12.3, there is a floating point exception in the range_decode_culshift function (called from range_decode_bits) in libavcodec/apedec.c that will lead to remote denial of service via crafted input.

Frequently asked questions

What is CVE-2018-20001?: In Libav 12.3, there is a floating point exception in the range_decode_culshift function (called from range_decode_bits) in libavcodec/apedec.c that will lead to remote denial of service via crafted input.
How severe is CVE-2018-20001?: CVE-2018-20001 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-20001 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20001?: CVE-2018-20001 affects Libav. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20001?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-20001 published?: CVE-2018-20001 was published on 2018-12-10 and last updated on 2026-06-17.

References

https://bugzilla.libav.org/show_bug.cgi?id=1141

Affected products (1)

cpe:2.3:a:libav:libav:12.3:*:*:*:*:*:*:*

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