Medium severity · published Oct 18, 2026
CVE-2026-112009
smpeg through 2.0.0 Heap Out-of-Bounds Read via MPEGsystem::FillBuffer
5.5
CVSS
0.1%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SM
smpeg · icculus
through 2.0.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-112009
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-112009
github.com
https://github.com/icculus/smpeg
github.com
https://github.com/icculus/smpeg/blob/d188dc111f4817288718705e4a84e248803ccfdc/MPEGsystem.cpp#L803-L823
hackmd.io
https://hackmd.io/@haindpwn/smpeg-system-header-stream-table-oob-read
www.vulncheck.com
https://www.vulncheck.com/advisories/smpeg-through-2.0.0-heap-out-of-bounds-read-via-mpegsystem-fillbuffer
More from smpeg
5.5
CVE-2026-112010
smpeg through 2.0.0 Integer Underflow via stream_header in MPEGsystem.cpp