CVE-2021-0397Network attack vector

Remote code execution via SDP double free

Published Mar 10, 2021 · Updated Aug 3, 2024

Remote code execution in Android 8.1, 9, 10, and 11 allows remote attackers to compromise the system through the SDP service. The sdp_copy_raw_data function in sdp_discovery.cc can free the same allocation twice when processing crafted service-discovery data, corrupting memory and enabling code execution. Exploitation requires no additional privileges or user interaction, although the attacker must reach the device's SDP interface.

CVSS severity9.8
Critical
EPSS probability5.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Android 8.1, 9, 10, and 11 allows remote attackers to compromise the system through the SDP service. The sdp_copy_raw_data function in sdp_discovery.cc can free the same allocation twice when processing crafted service-discovery data, corrupting memory and enabling code execution. Exploitation requires no additional privileges or user interaction, although the attacker must reach the device's SDP interface.

The record

CVE
CVE-2021-0397
Published
Mar 10, 2021
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-415, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 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 Android-8.1 Android-9 Android-10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Androidversion=Android-11 Android-8.1 Android-9 Android-10

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 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-415Double Free
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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