CVE-2026-70628 Details
Description
FFmpeg versions from 0.5 up to, but not including, 9.0 contain a signed integer overflow vulnerability in the DVB subtitle parser in libavcodec/dvbsub_parser.c that allows attackers to trigger a heap buffer overflow by supplying a crafted WTV file. The overflow causes the bounds-check guard expression to wrap to INT_MIN, bypassing the PARSE_BUF_SIZE comparison and invoking memcpy() with attacker-controlled data into a heap buffer, resulting in an out-of-bounds heap write and potential memory corruption or code execution.
A signed integer overflow vulnerability has been identified in the DVB subtitle parser of FFmpeg, specifically in versions 0.5 prior to 9.0. This vulnerability allows attackers to trigger a heap buffer overflow by supplying a crafted WTV file. The overflow occurs because the bounds-check guard expression wraps to INT_MIN, bypassing the PARSE_BUF_SIZE comparison. This flaw enables the memcpy() function to be invoked with attacker-controlled data, leading to an out-of-bounds write in a heap buffer, which could result in memory corruption or code execution.
Users can upgrade to FFmpeg version 9.0 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Aug 7, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-190 | Integer Overflow or Wraparound | [email protected] |
| CWE-787 | Out-of-bounds Write | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| ffmpeg ffmpeg | >= 0.5, < 9 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 1, 2026 | Initial Analysis | [email protected] |
| Aug 7, 2026 | CVE Modified | [email protected] |
| Aug 7, 2026 | CVE Modified | CISA-ADP |
| Aug 6, 2026 | New CVE Received | [email protected] |