CVE-2020-36135Network attack vector

Encoder crash via uninitialized image cleanup

Published Dec 2, 2021 · Updated Aug 4, 2024

NULL pointer dereference in AOM 2.0.1 allows context-dependent attackers to crash aomenc by supplying input from which no frame is read. The CVE record names rate_hist.c, while the linked upstream fix initializes the aomenc image descriptor before cleanup so aom_img_free() does not receive indeterminate state. Exploitation requires a user or application to process attacker-controlled media, and the documented consequence is an encoder crash without data disclosure or modification.

CVSS severity6.5
Medium
EPSS probability1.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in AOM 2.0.1 allows context-dependent attackers to crash aomenc by supplying input from which no frame is read. The CVE record names rate_hist.c, while the linked upstream fix initializes the aomenc image descriptor before cleanup so aom_img_free() does not receive indeterminate state. Exploitation requires a user or application to process attacker-controlled media, and the documented consequence is an encoder crash without data disclosure or modification.

The record

CVE
CVE-2020-36135
Published
Dec 2, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 2, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:P
5.5SUSECVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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