Status: UPDATED
| Advisory ID: CVE-2026-56211
Key Details
| CVE | CVE-2026-56211 |
| CVSS Score / Version | 7.1 (High) / CVSS v3.1 |
| Updated | 2026-10-02 |
| CVSS Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:H |
| CVSS Prose | attack vector is network; attack complexity is high; privileges required is none; user interaction is required; scope is unchanged; confidentiality impact is low; integrity impact is high; availability impact is high. |
| Affected products | see table below |
| Classified as | CWE-787 (Out-of-bounds Write) |
| Exploitation prediction (EPSS) | 0.88% probability of exploitation in the next 30 days (58% percentile) -- FIRST.org's EPSS model. |
Affected Products, Subsystems & Sectors
| Subsystems | OT Supporting Infrastructure |
| Sectors | Multiple |
What to Know
A remote code execution vulnerability was found in libaom, the reference AV1 codec implementation. Insufficient bounds validation in the AV1 encoder's SVC (Scalable Video Coding) layer ID control allows an attacker to supply crafted video frame pixels that overlap with internal encoder layer context structures. In fork-based video processing services, an attacker can use this to hijack the cyclic refresh map pointer, brute-force the process base address via a crash oracle, and redirect control flow to achieve arbitrary command execution. Exploitation requires the target service to use libaom with SVC encoding enabled and accept attacker-supplied video frames. (NVD)
What to Do
Monitor Red Hat's web page for any future patch releases.
References