Description
The II_step_one function in layer2.c in mpglib, as used in libmpgdecoder.a in LAME 3.99.5 and other products, allows remote attackers to cause a denial of service (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 | lame | 3.99.5+repack1-8 | — |
| Debian 13 | lame | 3.99.5+repack1-8 | — |
| Debian 12 | lame | 3.99.5+repack1-8 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | lame | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 12 SP2 | lame | 3.100-6.1 | openSUSE-SU-2018:0544-1, openSUSE-SU-2018:0543-1 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- LAME 3.99.5 - 'II_step_one' Buffer Overflow EDB-42258 · dos · Jun 26, 2017 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 2
- openSUSE-SU-2018:0543-1 Security update for lame SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2018:0544-1 Security update for lame SUSE / openSUSE Security Updates · Feb 4, 2026