CVE-2026-41069Public exploitNetwork attack vector

Process crash via empty chunk vector dereference

Published May 22, 2026 · Updated May 22, 2026

Out-of-bounds reads in Struktur AG libheif 1.21.2 and earlier allow remote attackers to crash a consuming process with a malformed HEIF sequence. In SampleAuxInfoReader's constructor, zero stco and saio entries leave chunks empty while a positive saiz sample count enters the loop and dereferences chunks[0]. Processing an attacker-controlled sequence through the public file-reading API is required, and the demonstrated consequence is a process crash.

CVSS severity6.5
Medium
EPSS probability0.25%
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 reads in Struktur AG libheif 1.21.2 and earlier allow remote attackers to crash a consuming process with a malformed HEIF sequence. In SampleAuxInfoReader's constructor, zero stco and saio entries leave chunks empty while a positive saiz sample count enters the loop and dereferences chunks[0]. Processing an attacker-controlled sequence through the public file-reading API is required, and the demonstrated consequence is a process crash.

The record

CVE
CVE-2026-41069
Published
May 22, 2026
Updated
May 22, 2026
Vendor
Struktur AG
Product
libheif
Classifications
CWE-476, CWE-125, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 22, 2026CVE publishedPublication date reported by the CVE source.
  2. May 22, 2026Record 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=< 1.22.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Struktur AG · libheifversion=< 1.22.0

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
6.9SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
6.5GitHub, Inc.CVSS:3.1/AV:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
CWE-125Out-of-bounds Read
T1204.002Malicious File

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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