CVE-2026-18090

Crash and memory disclosure via ICNS decompression

Published Sep 8, 2026 · Updated Sep 8, 2026

Out-of-bounds read in gdk-pixbuf allows attackers to crash image-processing applications or expose adjacent heap data through crafted ICNS files. The ICNS loader's uncompress() function decodes RLE data without checking the source buffer boundary before reading each run. A user or consuming application must cause the file to be decoded; the reported consequences are a process crash and limited adjacent-memory disclosure.

CVSS severity6.1
Medium
EPSS probability0.17%
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 gdk-pixbuf allows attackers to crash image-processing applications or expose adjacent heap data through crafted ICNS files. The ICNS loader's uncompress() function decodes RLE data without checking the source buffer boundary before reading each run. A user or consuming application must cause the file to be decoded; the reported consequences are a process crash and limited adjacent-memory disclosure.

The record

CVE
CVE-2026-18090
Published
Sep 8, 2026
Updated
Sep 8, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.4Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
6.1Red HatCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
8.2SUSECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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
T1204.002User Execution: Malicious File

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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