CVE-2026-56210

Friday, June 19, 2026

7.1

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

Summary

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).

Affected Software

Vendor	Product	Version Range	Status
Red Hat	Red Hat Enterprise Linux AI 3.3 for RHEL 9	`0:3.14.0-1.el9ai < *`	unaffected
Red Hat	Red Hat Enterprise Linux AI 3.4 for RHEL 9	`0:3.14.0-1.el9ai < *`	unaffected
Red Hat	Red Hat Enterprise Linux AI 3.5 for RHEL 9	`0:3.14.0-1.el9ai < *`	unaffected
Red Hat	Red Hat AI Inference Server 3.2	`1787860580 < *`	unaffected
Red Hat	Red Hat AI Inference Server 3.2	`1787772157 < *`	unaffected
Red Hat	Red Hat AI Inference Server 3.2	`1787884873 < *`	unaffected
Red Hat	Red Hat AI Inference Server 3.3	`1789508287 < *`	unaffected
Red Hat	Red Hat AI Inference Server 3.3	`1789502493 < *`	unaffected
Red Hat	Red Hat AI Inference Server 3.3	`1789504371 < *`	unaffected
Red Hat	Red Hat AI Inference Server 3.3	`1789582776 < *`	unaffected
Red Hat	Red Hat Hardened Images	`3.14.0-0.1.hum1 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.3	`1789137552 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.3	`1789137548 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.3	`1789137636 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.3	`1789137548 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.3	`1789137548 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.3	`1789137641 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.3	`1789137607 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.3	`1789137636 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.4	`1786611800 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.4	`1787076778 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.4	`1787077779 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.4	`1787076481 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.4	`1788197680 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.4	`1788197530 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.4	`1788197632 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.4	`1788197747 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.4	`1788197549 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.4	`1788199622 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.4	`1788197744 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.4	`1788197677 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.5	`1788198404 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.5	`1788198407 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.5	`1788197492 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.5	`1788197542 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.5	`1788197975 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.5	`1788197512 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.5	`1788197688 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.5	`1788197385 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.5	`1788198016 < *`	unaffected
Red Hat	Red Hat OpenShift AI 3.5	`1790703552 < *`	unaffected

Weaknesses

CWE-125: Out-of-bounds Read

Workarounds

There is no complete mitigation for this vulnerability. The following measures can reduce risk:

If using libaom as a standalone encoder library with SVC enabled, validate that spatial_layer_id does not exceed the number of configured spatial layers before calling aom_codec_control with AV1E_SET_SVC_LAYER_ID.
Restrict access to encoding services to trusted clients only.
For Firefox and Thunderbird, ensure browsers are updated to versions that include the patched libaom (v3.14.0 or later).
Monitor encoding service processes for unexpected crashes (segfaults) that may indicate exploitation attempts.

ADP Enrichment

CISA ADP Vulnrichment

SSVC:
Exploitation: none
- Automatable: no
- Technical Impact: partial

libaom: libaom: heap-buffer-overflow read via missing bounds check in ctrl_set_layer_id

Additional References

References

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