CVE-2022-39881

Out-of-bounds memory read via SIB12 PDU

Published Nov 9, 2022 · Updated May 1, 2025

Improper input validation in Exynos modems before SMR Nov-2022 Release 1 allows remote attackers to trigger an out-of-bounds memory read. The SIB12 PDU processing path fails to validate attacker-controlled fields before reading modem memory beyond the intended buffer. The attack requires adjacent-network access and no privileges or user interaction; the resulting read can interrupt modem service.

CVSS severity5.3
Medium
EPSS probability0.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Exynos modems before SMR Nov-2022 Release 1 allows remote attackers to trigger an out-of-bounds memory read. The SIB12 PDU processing path fails to validate attacker-controlled fields before reading modem memory beyond the intended buffer. The attack requires adjacent-network access and no privileges or user interaction; the resulting read can interrupt modem service.

The record

CVE
CVE-2022-39881
Published
Nov 9, 2022
Updated
May 1, 2025
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
CWE-20, CWE-125, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 9, 2022CVE publishedPublication date reported by the CVE source.
  2. May 1, 2025Record 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=Select devices using Exynos CP chipsets <SMR Nov-2022 Release 1

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Samsung Electronics Co., Ltd. · Samsung Mobile Devicesversion=Select devices using Exynos CP chipsets <SMR Nov-2022 Release 1

Published CVSS scores

5.3Samsung MobileCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-125Out-of-bounds Read
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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