Description
The mad_bit_skip function in bit.c in Underbit MAD libmad 0.15.1b allows remote attackers to cause a denial of service (heap-based buffer over-read and application crash) via a crafted audio file.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libmad | 0.15.1b-9 | — |
| Debian 13 | libmad | 0.15.1b-9 | — |
| Debian 12 | libmad | 0.15.1b-9 | — |
| Debian 9 | libmad | 0.15.1b-8+deb9u1 | DSA-4192-1 |
| Debian 8 | libmad | 0.15.1b-8+deb8u1 | DSA-4192-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | libmad | 0.15.1b-7+deb7u1 | DLA-1380-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | libmad | 0.15.1b-9ubuntu18.04.1 | — |
| Ubuntu 16.04 LTS | libmad | 0.15.1b-9ubuntu16.04.1 | — |
| Ubuntu 14.04 LTS | libmad | 0.15.1b-9ubuntu14.04.1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 12 SP1 | libmad | 0.15.1b-5.1 | openSUSE-SU-2018:0528-1, openSUSE-SU-2018:0527-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | libmad | 0.15.1b-r9 | — |
| Alpine v3.23 | libmad | 0.15.1b-r9 | — |
| Alpine v3.22 | libmad | 0.15.1b-r9 | — |
| Alpine v3.21 | libmad | 0.15.1b-r9 | — |
| Alpine v3.20 | libmad | 0.15.1b-r9 | — |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | libmad | 0.15.1b-r9 | — |
| Alpine v3.18 | libmad | 0.15.1b-r9 | — |
| Alpine v3.17 | libmad | 0.15.1b-r9 | — |
| Alpine v3.16 | libmad | 0.15.1b-r9 | — |
| Alpine v3.15 | libmad | 0.15.1b-r9 | — |
| Alpine v3.14 | libmad | 0.15.1b-r9 | — |
| Alpine v3.13 | libmad | 0.15.1b-r9 | — |
| Alpine v3.12 | libmad | 0.15.1b-r9 | — |
| Alpine v3.11 | libmad | 0.15.1b-r9 | — |
| Alpine v3.10 | libmad | 0.15.1b-r9 | — |
| Alpine v3.9 | libmad | 0.15.1b-r9 | — |
| Alpine v3.8 | libmad | 0.15.1b-r9 | — |
| Alpine v3.7 | libmad | 0.15.1b-r8 | — |
Advisories 4
- DSA-4192-1 libmad - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1380-1 libmad - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2018:0527-1 Security update for libmad SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2018:0528-1 Security update for libmad SUSE / openSUSE Security Updates · Feb 4, 2026