CVE-2023-49460Public exploitNetwork attack vector

Application crash via unchecked null image data

Published Dec 7, 2023 · Updated Oct 9, 2024

Null pointer dereference in libheif 1.17.5 allows remote attackers to crash image-decoding applications with a crafted HEIF file. The UncompressedImageCodec::decode_uncompressed_image function accepts a null uncompressed-data buffer and later passes it to memcpy, triggering a read from address zero. Exploitation requires an application built with uncompressed-codec support to decode the attacker-supplied file, and the demonstrated consequence is a process crash.

CVSS severity8.8
High
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Null pointer dereference in libheif 1.17.5 allows remote attackers to crash image-decoding applications with a crafted HEIF file. The UncompressedImageCodec::decode_uncompressed_image function accepts a null uncompressed-data buffer and later passes it to memcpy, triggering a read from address zero. Exploitation requires an application built with uncompressed-codec support to decode the attacker-supplied file, and the demonstrated consequence is a process crash.

The record

CVE
CVE-2023-49460
Published
Dec 7, 2023
Updated
Oct 9, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 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 buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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.

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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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

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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