CVE-2023-49464Public exploitNetwork attack vector

Application crash via unchecked component index

Published Dec 7, 2023 · Updated Aug 2, 2024

Out-of-bounds read in libheif 1.17.5 allows remote attackers to crash image-processing applications via a crafted HEIF file. UncompressedImageCodec::get_luma_bits_per_pixel_from_configuration_unci uses an uncC component index to access the cmpd component array without first checking its bounds. The application must process an uncompressed HEIF image containing a broken uncC component reference; demonstrated outcomes include a segmentation fault and sanitizer-detected memory errors.

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

Out-of-bounds read in libheif 1.17.5 allows remote attackers to crash image-processing applications via a crafted HEIF file. UncompressedImageCodec::get_luma_bits_per_pixel_from_configuration_unci uses an uncC component index to access the cmpd component array without first checking its bounds. The application must process an uncompressed HEIF image containing a broken uncC component reference; demonstrated outcomes include a segmentation fault and sanitizer-detected memory errors.

The record

CVE
CVE-2023-49464
Published
Dec 7, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 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?

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

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

No sourced classifications are available.

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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