CVE-2026-19967
Description
A flaw was found in Open Asset Import Library Assimp. A remote attacker could exploit a heap-based buffer overflow vulnerability, which occurs when a program writes more data to a memory block than it was intended to hold. This specific flaw exists within the Assimp::Compression::decompressBlock function during file compression decompression. By sending a specially crafted input, an attacker could potentially cause the application to crash (denial of service), disclose sensitive information, or execute arbitrary code.
Statement
A heap-based buffer overflow flaw in the Assimp library's decompression function (Assimp::Compression::decompressBlock) affects Red Hat products that process 3D model files, including qt5-qt3d and qt6-qtquick3d in Red Hat Enterprise Linux and Red Hat In-Vehicle OS. While exploitation requires user interaction, such as opening a malicious 3D asset, a successful remote attack could lead to significant impact on system confidentiality, integrity, and availability.
Mitigation
To mitigate this vulnerability, avoid processing untrusted or unverified 3D model files with applications that utilize the Assimp library. As this flaw requires user interaction to trigger, exercising caution with the source of 3D assets can reduce exposure. No direct configuration or operational control exists to disable the vulnerable decompression functionality without impacting the core features of the library.
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 | 6.3 | N/A | 6.3 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | Required | N/A | Required |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | Low | N/A | Low |
| Integrity Impact | Low | N/A | Low |
| Availability Impact | Low | N/A | Low |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RC:R
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.
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