CVE-2026-70632
Description
A flaw was found in FFmpeg. This out-of-bounds heap write vulnerability exists within the native GoPro CineForm HD (CFHD) decoder. A remote attacker can exploit this by providing a specially crafted AVI (Audio Video Interleave) file during stream analysis. This can lead to memory corruption and may be escalated to arbitrary code execution, allowing the attacker to run malicious code on the affected system.
Statement
This vulnerability is rated Important as it could lead to arbitrary code execution. Exploitation requires a local attacker to entice a user into processing a specially crafted AVI file, which triggers an out-of-bounds write in the FFmpeg CineForm HD (CFHD) decoder. This user interaction and local attack vector reduce the overall risk compared to remotely exploitable flaws.
Mitigation
To mitigate this issue, users should avoid processing untrusted or suspicious AVI media files with applications that utilize the FFmpeg library. Exercise caution when handling media from unknown sources to prevent potential exploitation.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.8 | N/A | 7.8 |
| Attack Vector | Local | N/A | Local |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | Required | N/A | Required |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | High | N/A | High |
| Integrity Impact | High | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Understanding the Weakness (CWE)
Integrity
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
Write operations could cause memory corruption. In some cases, an adversary can modify control data such as return addresses in order to execute unexpected code.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
Attempting to access out-of-range, invalid, or unauthorized memory could cause the product to crash.
Other
Technical Impact: Unexpected State
Subsequent write operations can produce undefined or unexpected results.
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