CVE-2018-20198
A NULL pointer dereference was discovered in ifilter_bank of libfaad/filtbank.c in Freeware...
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 LONG_START_SEQUENCE case.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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 LONG_START_SEQUENCE case.
- Record
CVE-2018-20198- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Weakness
- CWE-476
- Updated
- 2026-11-02
CVE List No score
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 LONG_START_SEQUENCE case.
- Record
CVE-2018-20198- Updated
- 2026-11-02
EUVDEUVD-2018-12765 No score
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 LONG_START_SEQUENCE case.
- Record
EUVD-2018-12765- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-xrvj-fcp5-3rm2
A NULL pointer dereference was discovered in ifilter_bank of libfaad/filtbank.c in Freeware...
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 LONG_START_SEQUENCE case.
- Record
GHSA-xrvj-fcp5-3rm2- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-476
- Updated
- 2026-11-02
OSVALPINE-CVE-2018-20198
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 LONG_START_SEQUENCE case.
- Record
ALPINE-CVE-2018-20198- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSV
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 LONG_START_SEQUENCE case.
- Record
CVE-2018-20198- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2018-20198
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 LONG_START_SEQUENCE case.
- Record
DEBIAN-CVE-2018-20198- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2018-20198
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 LONG_START_SEQUENCE case.
- Record
UBUNTU-CVE-2018-20198- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
faad2Alpine:v3.10 |
before 2.9.0-r0 | 2.9.0-r0 |
faad2Alpine:v3.11 |
before 2.9.0-r0 | 2.9.0-r0 |
faad2Alpine:v3.7 |
before 2.9.0-r0 | 2.9.0-r0 |
faad2Alpine:v3.8 |
before 2.9.0-r0 | 2.9.0-r0 |
faad2Alpine:v3.9 |
before 2.9.0-r0 | 2.9.0-r0 |
faad2Debian:12 |
before 2.8.8-2 | 2.8.8-2 |
faad2Debian:13 |
before 2.8.8-2 | 2.8.8-2 |
faad2Debian:14 |
before 2.8.8-2 | 2.8.8-2 |
faad2Debian:8 |
before 2.7-8+deb8u2, plus listed versions 2.7-82.7-8+deb8u1 |
2.7-8+deb8u2 |
faad2Debian:9 |
before 2.8.0~cvs20161113-1+deb9u2, plus listed versions 2.8.0~cvs20161113-12.8.0~cvs20161113-1+deb9u1 |
2.8.0~cvs20161113-1+deb9u2 |
faad2Ubuntu:Pro:14.04:LTS |
before 2.7-8+deb8u3build0.14.04.1~esm1, plus listed versions 2.7-82.7-8+deb7u1build0.14.04.1 |
2.7-8+deb8u3build0.14.04.1~esm1 |
faad2Ubuntu:Pro:16.04:LTS |
All versions, plus listed versions 2.8.0~cvs20150510-12.8.0~cvs20150510-1ubuntu0.12.8.0~cvs20150510-1ubuntu0.1+esm1 |
None known |
faad2Ubuntu:Pro:18.04:LTS |
All versions, plus listed versions 2.8.1-22.8.5-12.8.6-12.8.8-12.8.8-1ubuntu0.1~esm1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-20198 is a medium vulnerability (CVSS 5.5) in Audiocoding Freeware Advanced Audio Decoder 2, published December 18, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.21%, the 68th percentile. Fixed in faad2 2.9.0-r0.