CVE-2024-20878

Local code execution via unchecked grid-image size

Published Jun 4, 2024 · Updated Aug 1, 2024

Heap out-of-bounds write in libsavscmn.so before SMR Jun-2024 Release 1 allows local attackers to execute code on Samsung Mobile Devices. The grid-image parser fails to perform a proper size check before writing heap data, so a crafted grid image can write beyond its allocated buffer. Reachability requires local access to an affected Android 12, 13, or 14 device; successful memory corruption enables arbitrary code execution.

CVSS severity7.3
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

Heap out-of-bounds write in libsavscmn.so before SMR Jun-2024 Release 1 allows local attackers to execute code on Samsung Mobile Devices. The grid-image parser fails to perform a proper size check before writing heap data, so a crafted grid image can write beyond its allocated buffer. Reachability requires local access to an affected Android 12, 13, or 14 device; successful memory corruption enables arbitrary code execution.

The record

CVE
CVE-2024-20878
Published
Jun 4, 2024
Updated
Aug 1, 2024
Vendor
Samsung Electronics
Product
Android
Classifications
CWE-787, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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 versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Samsung Electronics · AndroidAffected versions are unavailable in this record.
Samsung Electronics Co., Ltd. · Samsung Mobile DevicesAffected versions are unavailable in this record.

Published CVSS scores

7.3Samsung MobileCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
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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