CVE-2026-112009: Out-of-bounds Read in icculus smpeg
Description
smpeg through 2.0.0 contains a heap out-of-bounds read vulnerability in MPEGsystem::FillBuffer() that allows attackers to read past the 16384-byte buffer by supplying a crafted system header stream table. Attackers can provide an MPEG file whose stream table bytes all set the high bit, which crashes applications opening it through SMPEG_new, SMPEG_new_rwops, or SMPEG_new_data.
CVSS v4.0
Score 6.8medium
Affected software
icculus
smpeg
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-112009 affects icculus smpeg through version 2.0.0. It is a heap out-of-bounds read in the MPEGsystem::FillBuffer() function. Attackers can exploit this by supplying an MPEG file whose system header stream table bytes all have the high bit set, causing the function to read past the 16384-byte buffer limit. This results in crashes of applications that use SMPEG_new, SMPEG_new_rwops, or SMPEG_new_data to open the crafted MPEG files.
Potential Impact
Successful exploitation of this vulnerability allows an attacker to cause a denial of service by crashing applications that process malicious MPEG files with the crafted stream table. There is no indication of code execution or information disclosure beyond the out-of-bounds read and crash.
Mitigation Recommendations
No patch or official fix information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted MPEG files with affected versions of smpeg.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-18T01:23:46.084Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad4b23a2cdf04f65664e4b4
Added to database: 10/18/2026, 11:49:14 UTC
Last enriched: 10/18/2026, 12:04:08 UTC
Last updated: 10/18/2026, 19:55:35 UTC
Views: 5
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