---
cve: "CVE-2026-56210"
severity: "HIGH"
cvss: 7.1
epss: "0.3%"
vendor: "Red Hat"
kev: false
exploited: false
published: "2026-06-19 16:28:33"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T21:59:08+02:00"
---

# CVE-2026-56210

> 7.1 HIGH

## Beschreibung

A heap-buffer-overflow read vulnerability was found in libaom, the reference AV1 codec implementation. A missing bounds check in the SVC (Scalable Video Coding) layer ID control function allows setting a spatial_layer_id exceeding the configured number of layers. This causes an out-of-bounds heap read of approximately 40,728 bytes when computing a layer context array index. An attacker who can influence SVC encoder parameters in a network-facing service could exploit this for information disclosure (heap content leak) or denial of service (segmentation fault from hitting unmapped memory).

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Referenzen

- <https://access.redhat.com/errata/RHSA-2026:30814>
- <https://access.redhat.com/errata/RHSA-2026:42875>
- <https://access.redhat.com/errata/RHSA-2026:51100>
- <https://access.redhat.com/errata/RHSA-2026:51146>
- <https://access.redhat.com/errata/RHSA-2026:60520>
- <https://access.redhat.com/errata/RHSA-2026:61627>
- <https://access.redhat.com/errata/RHSA-2026:61628>
- <https://access.redhat.com/errata/RHSA-2026:61629>
- <https://access.redhat.com/errata/RHSA-2026:68634>
- <https://access.redhat.com/errata/RHSA-2026:68637>
- <https://access.redhat.com/errata/RHSA-2026:68638>
- <https://access.redhat.com/errata/RHSA-2026:68639>
- <https://access.redhat.com/errata/RHSA-2026:68640>
- <https://access.redhat.com/errata/RHSA-2026:68696>
- <https://access.redhat.com/errata/RHSA-2026:68697>
- <https://access.redhat.com/errata/RHSA-2026:68698>
- <https://access.redhat.com/errata/RHSA-2026:68699>
- <https://access.redhat.com/errata/RHSA-2026:68708>
- <https://access.redhat.com/errata/RHSA-2026:68709>
- <https://access.redhat.com/errata/RHSA-2026:68710>
- <https://access.redhat.com/security/cve/CVE-2026-56210>
- <https://aomedia.googlesource.com/aom/+/a93ba0ffaa>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2490801>
- <https://issues.chromium.org/issues/503975732>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-56210) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_