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NVD / CVE Program· CNA redhat

CVE-2026-56208: Libaom: libaom: heap buffer overflow in av1 encoder first-pass stats buffer via lap mode

Noroxi assessment

Priority: Monitor (action score 30/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.45% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: aom (Debian:12) 3.6.0-1+deb12u3; aom (Debian:13) 3.12.1-1+deb13u1; aom (Debian:14) 3.14.1-1.

Low priority for now. Upgrade to aom (Debian:12) 3.6.0-1+deb12u3; aom (Debian:13) 3.12.1-1+deb13u1; aom (Debian:14) 3.14.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A heap buffer overflow vulnerability was found in libaom, the reference AV1 codec implementation. A flaw in the AV1 encoder's Look-Ahead Processing (LAP) mode causes the first-pass stats ring buffer wrap-around guard to be bypassed when g_lag_in_frames is set to 1 or higher. This results in a 232-byte out-of-bounds write on every encoded frame after the second, corrupting adjacent heap objects. An attacker who can influence encoder configuration in a transcoding service or WebRTC session could exploit this to cause a denial of service (process crash) or potentially achieve code execution.

HighCVSS 7.6 · v3.1—No exploit Fix available
Published
Jun 19, 2026
Updated
Nov 6, 2026
EPSS
0.4% · 39th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.6 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
7.6
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
enterprise linux eus10.0
rhel els7
enterprise linux8
rhel aus8.4
rhel eus long life8.4
rhel aus8.6
rhel eus long life8.6
rhel tus8.8
rhel e4s8.8
enterprise linux9
rhel e4s9.2
rhel e4s9.4

and 9 more

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat Red Hat AI Inference Server

    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected

  • Red Hat Red Hat AI Inference Server 3.2

    • 1787860580 and laternot affected · rpm
    • 1787772157 and laternot affected · rpm
    • 1787884873 and laternot affected · rpm

  • Red Hat Red Hat AI Inference Server 3.3

    • 1789508287 and laternot affected · rpm
    • 1789502493 and laternot affected · rpm
    • 1789504371 and laternot affected · rpm
    • 1789582776 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 10

    • all versionsaffected
    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support

    • 0:140.13.0-1.el10_0 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support

    • 0:140.13.0-1.el7_9 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8

    • 0:140.13.0-1.el8_10 and laternot affected · rpm
    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

    • 0:140.13.0-1.el8_4 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

    • 0:140.13.0-1.el8_4 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

    • 0:140.13.0-1.el8_6 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

    • 0:140.13.0-1.el8_6 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service

    • 0:140.13.0-1.el8_8 and laternot affected · rpm

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12aombefore 3.6.0-1+deb12u33.6.0-1+deb12u3
Debian:13aombefore 3.12.1-1+deb13u13.12.1-1+deb13u1
Debian:14aombefore 3.14.1-13.14.1-1
openSUSE:Leap 16.0libaombefore 3.11.0-160000.3.13.11.0-160000.3.1
openSUSE:Leap 16.0libaom-devel-docbefore 3.11.0-160000.3.13.11.0-160000.3.1
openSUSE:Tumbleweedlibaombefore 3.15.2-1.13.15.2-1.1
Red Hat:enterprise_linux_ai:3.5::el9aombefore 0:3.14.0-1.el9ai0:3.14.0-1.el9ai
Red Hat:enterprise_linux_ai:3.5::el9aom-debuginfobefore 0:3.14.0-1.el9ai0:3.14.0-1.el9ai
Red Hat:enterprise_linux_ai:3.5::el9aom-debugsourcebefore 0:3.14.0-1.el9ai0:3.14.0-1.el9ai
Red Hat:enterprise_linux_ai:3.5::el9libaombefore 0:3.14.0-1.el9ai0:3.14.0-1.el9ai
Red Hat:enterprise_linux_ai:3.5::el9libaom-debuginfobefore 0:3.14.0-1.el9ai0:3.14.0-1.el9ai
Red Hat:enterprise_linux_ai:3.5::el9libaom-develbefore 0:3.14.0-1.el9ai0:3.14.0-1.el9ai
Red Hat:enterprise_linux_ai:3.5::el9libaom-devel-docsbefore 0:3.14.0-1.el9ai0:3.14.0-1.el9ai
Red Hat:hummingbird:1aombefore 0:3.14.0-0.1.hum10:3.14.0-0.1.hum1
Red Hat:hummingbird:1libaombefore 0:3.14.0-0.1.hum10:3.14.0-0.1.hum1
Red Hat:hummingbird:1libaom-develbefore 0:3.14.0-0.1.hum10:3.14.0-0.1.hum1
Red Hat:hummingbird:1libaom-devel-docsbefore 0:3.14.0-0.1.hum10:3.14.0-0.1.hum1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSlibaombefore 3.7.1-150400.3.12.13.7.1-150400.3.12.1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSlibaom-devel-docbefore 3.7.1-150400.3.12.13.7.1-150400.3.12.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7libaombefore 3.7.1-150600.3.9.13.7.1-150600.3.9.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7libyuvbefore 20230517+a377993-150600.3.4.220230517+a377993-150600.3.4.2
SUSE:Linux Enterprise Module for Basesystem 15 SP7SVT-AV1before 1.8.0-150600.3.2.51.8.0-150600.3.2.5
SUSE:Linux Enterprise Module for Desktop Applications 15 SP7libaom-devel-docbefore 3.7.1-150600.3.9.33.7.1-150600.3.9.3
SUSE:Linux Enterprise Server 16.0libaombefore 3.11.0-160000.3.13.11.0-160000.3.1

Same product

red hat: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-18917Libvirt: integer overflow in nodegetfreepages rpc handler leading to heap buffer overflow
    31Monitor
  • CVE-2026-63622Libvirt: swtpm privilege escalation via symlink following
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:aom3.6.0-1+deb12u3 · Debian:12Package registry (OSV)
opensuse:libaom3.11.0-160000.3.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:libaom3.15.2-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:libaom-devel-doc3.11.0-160000.3.1 · openSUSE:Leap 16.0Package registry (OSV)
red hat:aom0:3.14.0-0.1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:aom-debuginfo0:3.14.0-1.el9ai · Red Hat:enterprise_linux_ai:3.5::el9Package registry (OSV)
red hat:aom-debugsource0:3.14.0-1.el9ai · Red Hat:enterprise_linux_ai:3.5::el9Package registry (OSV)
red hat:libaom0:3.14.0-0.1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:libaom0:3.14.0-1.el9ai · Red Hat:enterprise_linux_ai:3.5::el9Package registry (OSV)
red hat:libaom-debuginfo0:3.14.0-1.el9ai · Red Hat:enterprise_linux_ai:3.5::el9Package registry (OSV)
red hat:libaom-devel0:3.14.0-0.1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:libaom-devel0:3.14.0-1.el9ai · Red Hat:enterprise_linux_ai:3.5::el9Package registry (OSV)
red hat:libaom-devel-docs0:3.14.0-0.1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:libaom-devel-docs0:3.14.0-1.el9ai · Red Hat:enterprise_linux_ai:3.5::el9Package registry (OSV)
suse:libaom3.11.0-160000.3.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:libaom-devel-doc3.7.1-150400.3.12.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSPackage registry (OSV)
suse:libyuv20230517+a377993-150600.3.4.2 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)
suse:SVT-AV11.8.0-150600.3.2.5 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
Low
Availability impact
High

Weakness class (CWE)

CWE-122 · Heap-based Buffer Overflow

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (19 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records