A remote code execution vulnerability was found in libaom, the reference AV1 codec implementation. (CVE-2026-56211)
A remote code execution vulnerability (CVE-2026-56211) exists in libaom, the reference AV1 codec implementation. The issue arises from insufficient bounds validation in the AV1 encoder's SVC layer ID control, allowing crafted video frames to overlap internal encoder structures. Exploitation requires the target to use libaom with SVC encoding enabled and accept attacker-supplied video frames. Red Hat has released security updates addressing this vulnerability in their Hardened Images RPMs and AI application platform packages.
AI Analysis
Technical Summary
CVE-2026-56211 is a high severity remote code execution vulnerability in libaom caused by insufficient bounds validation in the AV1 encoder's Scalable Video Coding (SVC) layer ID control. An attacker can supply specially crafted video frames that overlap with internal encoder layer context structures, enabling hijacking of internal pointers and redirecting control flow to execute arbitrary commands. Exploitation requires the use of libaom with SVC encoding enabled and acceptance of attacker-supplied video frames. Red Hat has issued security advisories and released updated RPM packages (version 3.14.0-0.1.hum1 and 3.14.0-1.el9ai) that fix this vulnerability.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary code on affected systems running libaom with SVC encoding enabled. This can lead to complete compromise of the vulnerable process, impacting confidentiality, integrity, and availability. The vulnerability is rated high severity with CVSS 3.1 vector AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:H. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released official security updates that address CVE-2026-56211 in their Hardened Images RPMs and Red Hat Enterprise Linux AI 3.5 packages. Users should apply these updates promptly to remediate the vulnerability. Details and packages are available at https://access.redhat.com/errata/RHSA-2026:30814 and https://access.redhat.com/errata/RHSA-2026:42875. Patch status is confirmed by vendor advisories. No additional mitigation steps are indicated beyond applying the official fixes.
A remote code execution vulnerability was found in libaom, the reference AV1 codec implementation. (CVE-2026-56211)
Description
A remote code execution vulnerability (CVE-2026-56211) exists in libaom, the reference AV1 codec implementation. The issue arises from insufficient bounds validation in the AV1 encoder's SVC layer ID control, allowing crafted video frames to overlap internal encoder structures. Exploitation requires the target to use libaom with SVC encoding enabled and accept attacker-supplied video frames. Red Hat has released security updates addressing this vulnerability in their Hardened Images RPMs and AI application platform packages.
CVSS v3.1
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-56211 is a high severity remote code execution vulnerability in libaom caused by insufficient bounds validation in the AV1 encoder's Scalable Video Coding (SVC) layer ID control. An attacker can supply specially crafted video frames that overlap with internal encoder layer context structures, enabling hijacking of internal pointers and redirecting control flow to execute arbitrary commands. Exploitation requires the use of libaom with SVC encoding enabled and acceptance of attacker-supplied video frames. Red Hat has issued security advisories and released updated RPM packages (version 3.14.0-0.1.hum1 and 3.14.0-1.el9ai) that fix this vulnerability.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary code on affected systems running libaom with SVC encoding enabled. This can lead to complete compromise of the vulnerable process, impacting confidentiality, integrity, and availability. The vulnerability is rated high severity with CVSS 3.1 vector AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:H. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released official security updates that address CVE-2026-56211 in their Hardened Images RPMs and Red Hat Enterprise Linux AI 3.5 packages. Users should apply these updates promptly to remediate the vulnerability. Details and packages are available at https://access.redhat.com/errata/RHSA-2026:30814 and https://access.redhat.com/errata/RHSA-2026:42875. Patch status is confirmed by vendor advisories. No additional mitigation steps are indicated beyond applying the official fixes.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-qr4p-j2pf-4w4x
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-56211"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a5fcf481010f89cc2152d04
Added to database: 07/21/2026, 19:58:00 UTC
Last enriched: 07/21/2026, 20:06:08 UTC
Last updated: 07/21/2026, 20:58:53 UTC
Views: 2
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