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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).

The vulnerability CVE-2026-56210 affects libaom, the reference AV1 codec implementation, specifically in the SVC layer ID control function where a missing bounds check permits setting a spatial_layer_id beyond the configured number of layers. This results in an out-of-bounds heap read of approximately 40,728 bytes when computing a layer context array index. An attacker able to influence SVC encoder parameters in a network-facing service could exploit this flaw to leak heap memory contents or cause a segmentation fault leading to denial of service. Red Hat has issued security advisories RHSA-2026:30814 and RHSA-2026:42875, providing updated RPM packages (aom and libaom version 3.14.0-0.1.hum1 and 3.14.0-1.el9ai) that fix this vulnerability. The affected product is Red Hat Enterprise Linux AI 3.3 and 3.5 for RHEL 9, with affected versions starting from 3.5 and above. The CVSS v3.1 score is 7.1, indicating high severity with network attack vector, low attack complexity, no privileges required, user interaction required, and impact limited to confidentiality loss and high availability impact.

Detailed information about CVE-2026-56210: Out-of-bounds Read in Red Hat Red Hat Enterprise Linux 10 affecting Red Hat Red Hat Enterprise Linux 10. Get real-tim

CVE-2026-56210: Out-of-bounds Read in Red Hat Red Hat Enterprise Linux 10 - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-56210: Out-of-bounds Read in Red Hat Red Hat Enterprise Linux AI 3.3 for RHEL 9

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