CVE-2026-56210

Description

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).

PUBLISHED Reserved 2026-06-19 | Published 2026-06-19 | Updated 2026-07-06 | Assigner redhat

Problem types

Out-of-bounds Read

Product status

Timeline

Credits

Red Hat would like to thank The FuzzAnything Team (FuzzAnything) for reporting this issue.

References

access.redhat.com/security/cve/CVE-2026-56210 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2490801 (RHBZ#2490801) issue-tracking

security.access.redhat.com/...2/vex/2026/cve-2026-56210.json

access.redhat.com/errata/RHSA-2026:30814 vendor-advisory

access.redhat.com/errata/RHSA-2026:30814 (RHSA-2026:30814) vendor-advisory

access.redhat.com/security/cve/CVE-2026-56210 vdb-entry

aomedia.googlesource.com/aom/+/a93ba0ffaa

bugzilla.redhat.com/show_bug.cgi?id=2490801 (RHBZ#2490801) issue-tracking

issues.chromium.org/issues/503975732

cve.org (CVE-2026-56210)

nvd.nist.gov (CVE-2026-56210)

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