CVE-2023-42721Network attack vector

Media-processing interruption via unvalidated FLV input

Published Dec 4, 2023 · Updated Dec 2, 2024

Memory-bounds errors in the UNISOC SC9863A Android 11 FLV extractor allow remote attackers to interrupt media processing. The extractor fails to validate malformed FLV input before performing memory-buffer operations; UNISOC has not disclosed the affected function or exact access. Exploitation requires user interaction with attacker-supplied media and interrupts FLV processing, with no reported data disclosure or modification.

CVSS severity4.3
Medium
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory-bounds errors in the UNISOC SC9863A Android 11 FLV extractor allow remote attackers to interrupt media processing. The extractor fails to validate malformed FLV input before performing memory-buffer operations; UNISOC has not disclosed the affected function or exact access. Exploitation requires user interaction with attacker-supplied media and interrupts FLV processing, with no reported data disclosure or modification.

The record

CVE
CVE-2023-42721
Published
Dec 4, 2023
Updated
Dec 2, 2024
Vendor
UNISOC
Product
UNISOC SC9863A
Classifications
CWE-119, T0814
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 2, 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=Android11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

UNISOC · UNISOC SC9863Aversion=Android11

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.3UNISOCCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T0814Denial 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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