CVE-2024-47021Network attack vector

Remote memory disclosure via unchecked cell-broadcast language

Published Oct 25, 2024 · Updated Oct 28, 2024

An out-of-bounds read in Google Android's SMS component allows remote attackers to disclose memory through a crafted cell broadcast. The sms_ExtractCbLanguage function in sms_CellBroadcast.c parses a language field without checking its bounds and reads beyond the supplied buffer. No execution privileges or user interaction are required, but exposure is limited to supported Pixel devices containing the affected SMS implementation.

CVSS severity7.5
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds read in Google Android's SMS component allows remote attackers to disclose memory through a crafted cell broadcast. The sms_ExtractCbLanguage function in sms_CellBroadcast.c parses a language field without checking its bounds and reads beyond the supplied buffer. No execution privileges or user interaction are required, but exposure is limited to supported Pixel devices containing the affected SMS implementation.

The record

CVE
CVE-2024-47021
Published
Oct 25, 2024
Updated
Oct 28, 2024
Vendor
Google
Product
Android
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 25, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 28, 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 kernel

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google · Androidversion=Android kernel

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.1CISA-ADPCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

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-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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