Vulnerability · Published Oct 18, 2026 · Assigned by VulnCheck
CVE-2026-112010smpeg through 2.0.0 Integer Underflow via stream_header in MPEGsystem.cpp
Medium 5.5
In plain English
A medium-severity security flaw in smpeg from icculus. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.1%top 97.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
smpeg through 2.0.0 contains an integer underflow vulnerability in stream_header() in MPEGsystem.cpp that allows attackers to wrap packet_size by declaring an undersized packet length. Attackers can supply a crafted MPEG file opened via SMPEG_new, SMPEG_new_rwops or SMPEG_new_data to trigger a reachable assertion or out-of-bounds copy, crashing the application.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | smpeg | no fix listed | DEBIAN-CVE-2026-112010 |
| Debian:13 | smpeg | no fix listed | DEBIAN-CVE-2026-112010 |
| Debian:14 | smpeg | no fix listed | DEBIAN-CVE-2026-112010 |
| Ubuntu:22.04:LTS | smpeg | no fix listed | UBUNTU-CVE-2026-112010 |
| Ubuntu:24.04:LTS | smpeg | no fix listed | UBUNTU-CVE-2026-112010 |
| Ubuntu:26.04:LTS | smpeg | no fix listed | UBUNTU-CVE-2026-112010 |
| Ubuntu:26.10 | smpeg | no fix listed | UBUNTU-CVE-2026-112010 |
Affected products (as reported)
Weakness: CWE-191 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
References
- https://hackmd.io/@haindpwn/smpeg-system-header-stream-table-oob-read technical-description, exploit
- https://github.com/icculus/smpeg/blob/d188dc111f4817288718705e4a84e248803ccfdc/MPEGsystem.cpp#L295-L350 technical-description
- https://github.com/icculus/smpeg/blob/d188dc111f4817288718705e4a84e248803ccfdc/MPEGsystem.cpp#L777 technical-description
- https://github.com/icculus/smpeg product
- VulnCheck Advisory: smpeg through 2.0.0 Integer Underflow via stream_header in MPEGsystem.cpp third-party-advisory