CVE-2021-0335Network attack vector

Remote information disclosure via decoder use-after-free

Published Feb 10, 2021 · Updated Aug 3, 2024

Use-after-free in Android 11 Media Framework allows remote attackers to disclose process memory through crafted media requiring user interaction. MediaCodec::onMessageReceived creates a release surface without propagating the original surface's usage, allowing C2SoftHevcDec to access freed storage and write out of bounds. No execution privileges are required, and the published impact is limited to information disclosure.

CVSS severity6.5
Medium
EPSS probability0.84%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Android 11 Media Framework allows remote attackers to disclose process memory through crafted media requiring user interaction. MediaCodec::onMessageReceived creates a release surface without propagating the original surface's usage, allowing C2SoftHevcDec to access freed storage and write out of bounds. No execution privileges are required, and the published impact is limited to information disclosure.

The record

CVE
CVE-2021-0335
Published
Feb 10, 2021
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-416
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 10, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Android-11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Androidversion=Android-11

Published CVSS scores

4.3NIST National Vulnerability DatabaseAV:N/AC:M/Au:N/C:P/I:N/A:N
6.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

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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