CVE-2023-0996

Memory corruption via unchecked strided image copy

Published Feb 24, 2023 · Updated Mar 11, 2025

Buffer overflow in the libheif 1.14.2 Emscripten wrapper allows local users to corrupt linear memory through a crafted image file. The heif_js_decode_image path performs a memcpy while processing strided image data without ensuring that the copy fits its destination. An application built with the wrapper must decode the file; successful corruption can compromise the affected process's data or interrupt it.

CVSS severity7.8
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Buffer overflow in the libheif 1.14.2 Emscripten wrapper allows local users to corrupt linear memory through a crafted image file. The heif_js_decode_image path performs a memcpy while processing strided image data without ensuring that the copy fits its destination. An application built with the wrapper must decode the file; successful corruption can compromise the affected process's data or interrupt it.

The record

CVE
CVE-2023-0996
Published
Feb 24, 2023
Updated
Mar 11, 2025
Vendor
Struktur AG
Product
libheif
Classifications
CWE-120, CAPEC-100, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 11, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.14.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Struktur AG · libheifversion=1.14.2

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/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.

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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CAPEC-100Overflow Buffers
T1203Exploitation for Client Execution

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo