CVE-2018-9423

Media-processing denial of service via unchecked SPS counts

Published Dec 2, 2024 · Updated Dec 3, 2024

Out-of-bounds read in Android 7, 7.1.1, 7.1.2, 8, and 8.1 allows attackers to crash media processing via crafted HEVC data. The libhevc SPS parser accepts out-of-range num_short_term_ref_pic_sets or num_long_term_ref_pics_sps values, allowing later reference-picture array access beyond valid bounds. Exploitation requires user interaction and no additional privileges; the documented consequence is denial of service, not code execution.

CVSS severity6.5
Medium
EPSS probability0.16%
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 Android 7, 7.1.1, 7.1.2, 8, and 8.1 allows attackers to crash media processing via crafted HEVC data. The libhevc SPS parser accepts out-of-range num_short_term_ref_pic_sets or num_long_term_ref_pics_sps values, allowing later reference-picture array access beyond valid bounds. Exploitation requires user interaction and no additional privileges; the documented consequence is denial of service, not code execution.

The record

CVE
CVE-2018-9423
Published
Dec 2, 2024
Updated
Dec 3, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-125, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 2, 2024CVE publishedPublication date reported by the CVE source.
  2. Dec 3, 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=7
  2. Affected versionversion=7.1.1
  3. Affected versionversion=7.1.2
  4. Affected versionversion=8
  5. Affected versionversion=8.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Google Cloud · Androidversion=7; version=7.1.1; version=7.1.2; version=8; version=8.1

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/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.

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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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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.

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Technologies

Your stack

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Your stack

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