CVE-2026-3081
Description
A flaw was found in GStreamer. A remote attacker can exploit this vulnerability by providing specially crafted H.266 codec data during the parsing of decoding units. This issue arises from insufficient validation of the length of user-supplied data before it is copied to a fixed-length stack-based buffer. Successful exploitation can lead to a stack-based buffer overflow, allowing for arbitrary code execution in the context of the current process.
Statement
This is an IMPORTANT vulnerability affecting the GStreamer H.266 codec parser. The flaw allows remote attackers to execute arbitrary code by providing specially crafted H.266 media content. Exploitation requires user interaction with applications that process untrusted H.266 streams using GStreamer.
Mitigation
To reduce the risk of exploitation, avoid processing untrusted H.266 media content with applications that use the GStreamer framework. Restricting the sources of H.266 content to trusted origins is recommended.
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,Confidentiality,Availability
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
Buffer overflows often can be used to execute arbitrary code, which is usually outside the scope of the product's implicit security policy. This can often be used to subvert any other security service.
Availability
Technical Impact: Modify Memory; DoS: Crash, Exit, or Restart; DoS: Resource Consumption (CPU)
Buffer overflows generally lead to crashes. Other attacks leading to lack of availability are possible, including putting the product into an infinite loop.
Frequently Asked Questions
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