How severe is CVE-2018-20194?

CVE-2018-20194 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-20194 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20194?

CVE-2018-20194 affects Audiocoding Freeware Advanced Audio Decoder 2. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20194?

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-2018-20194 published?

CVE-2018-20194 was published on 2018-12-18 and last updated on 2026-06-17.

CVE-2018-20194

CVE-2018-20194 is a high-severity vulnerability in Audiocoding Freeware Advanced Audio Decoder 2 with a CVSS 3.x base score of 7.8. 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-787.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Audiocoding Freeware Advanced Audio Decoder 2
Published: 2018-12-18
Last modified: 2026-06-17

Description

There is a stack-based buffer underflow in the third instance of the calculate_gain function in libfaad/sbr_hfadj.c in Freeware Advanced Audio Decoder 2 (FAAD2) 2.8.8. A crafted input will lead to a denial of service or possibly unspecified other impact because limiting the additional noise energy level is mishandled for the G_max <= G case.

Frequently asked questions

What is CVE-2018-20194?: There is a stack-based buffer underflow in the third instance of the calculate_gain function in libfaad/sbr_hfadj.c in Freeware Advanced Audio Decoder 2 (FAAD2) 2.8.8. A crafted input will lead to a denial of service or possibly unspecified other impact because limiting the additional noise energy level is mishandled for the G_max <= G case.
How severe is CVE-2018-20194?: CVE-2018-20194 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-20194 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20194?: CVE-2018-20194 affects Audiocoding Freeware Advanced Audio Decoder 2. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20194?: 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-2018-20194 published?: CVE-2018-20194 was published on 2018-12-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:audiocoding:freeware_advanced_audio_decoder_2:2.8.8:*:*:*:*:*:*:*

More vulnerabilities in Audiocoding Freeware Advanced Audio Decoder 2

CVE-2019-15296 — High (CVSS 7.8): An issue was discovered in Freeware Advanced Audio Decoder 2 (FAAD2) 2.8.8. The faad_resetbits function in…
CVE-2018-20197 — High (CVSS 7.8): There is a stack-based buffer underflow in the third instance of the calculate_gain function in libfaad/sbr_hfadj.c in…
CVE-2018-20196 — High (CVSS 7.8): There is a stack-based buffer overflow in the third instance of the calculate_gain function in libfaad/sbr_hfadj.c in…
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CVE-2018-19503 — High (CVSS 7.8): An issue was discovered in Freeware Advanced Audio Decoder 2 (FAAD2) 2.8.1. There was a stack-based buffer overflow in…
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