CVE-2021-1001

Local information disclosure via oversized encoder dimensions

Published Dec 15, 2021 · Updated Aug 3, 2024

Out-of-bounds read in Android 12 Media Framework allows local users to disclose heap data through the MPEG-4 video encoder. PVInitVideoEncoder fails to reject dimensions above 2048 by 2048 before processing associated heap buffers, permitting a read beyond an allocation. A low-privileged local process can reach the flaw without user interaction; the documented consequence is information disclosure only.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Android 12 Media Framework allows local users to disclose heap data through the MPEG-4 video encoder. PVInitVideoEncoder fails to reject dimensions above 2048 by 2048 before processing associated heap buffers, permitting a read beyond an allocation. A low-privileged local process can reach the flaw without user interaction; the documented consequence is information disclosure only.

The record

CVE
CVE-2021-1001
Published
Dec 15, 2021
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-125
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 15, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

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  1. Affected versionversion=Android-12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Google Cloud · Androidversion=Android-12

Published CVSS scores

2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

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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