CVE-2024-39432

Remote service interruption via unchecked RLC data

Published Sep 27, 2024 · Updated Sep 27, 2024

Out-of-bounds read in the UMTS RLC driver in UNISOC T820 on Android 12 through 14 allows remote attackers to crash the modem. The driver omits a bounds check while processing untrusted RLC data and consequently reads beyond the intended buffer. Exploitation requires System execution privileges and interrupts cellular service; no code execution or persistent device damage is reported.

CVSS severity4.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in the UMTS RLC driver in UNISOC T820 on Android 12 through 14 allows remote attackers to crash the modem. The driver omits a bounds check while processing untrusted RLC data and consequently reads beyond the intended buffer. Exploitation requires System execution privileges and interrupts cellular service; no code execution or persistent device damage is reported.

The record

CVE
CVE-2024-39432
Published
Sep 27, 2024
Updated
Sep 27, 2024
Vendor
UNISOC
Product
UNISOC T820
Classifications
CWE-121, CWE-787, T1499
Attack vector
adjacent
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 27, 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_12
  2. Affected versionversion=android_13
  3. Affected versionversion=android_14

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesUnavailable in this record.

What is affected?

UNISOC · UNISOC T820version=android_12; version=android_13; version=android_14

Published CVSS scores

8.3UNISOCCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
4.5NVDCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/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.

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)
Vectoradjacent
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-787Out-of-bounds Write
T1499Endpoint Denial of Service

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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