CVE-2018-20199: Audiocoding Freeware Advanced Audio Decoder 2

Medium severity, CVSS 5.5. EPSS: 1.1% chance of exploitation in the next 30 days.

A NULL pointer dereference was discovered in ifilter_bank of libfaad/filtbank.c in Freeware Advanced Audio Decoder 2 (FAAD2) 2.8.8. The vulnerability causes a segmentation fault and application crash, which leads to denial of service because adding to windowed output is mishandled in the ONLY_LONG_SEQUENCE case.

Affected products

• Audiocoding Freeware Advanced Audio Decoder 2: before 2.9.0 (fixed in 2.9.0)
• Debian Debian Linux: version 8.0 only; version 9.0 only; version 10.0 only

Published 2018-12-18. Last modified 2026-06-17.