CVE-2025-7345 – A heap buffer overflow vulnerability in gdk-pix... (How to Fix)

Q: What is the severity of CVE-2025-7345?

CVE-2025-7345 has a CVSS score of 7.5 (HIGH). A heap buffer overflow vulnerability in gdk-pixbuf and glib allows processing malicious JPEG images to cause out-of-bounds memory reads. This can lead to application crashes or potentially arbitrary code execution. Systems using affected versions of gdk-pixbuf or glib for image processing are vulnerable.

📋 TL;DR

A heap buffer overflow vulnerability in gdk-pixbuf and glib allows processing malicious JPEG images to cause out-of-bounds memory reads. This can lead to application crashes or potentially arbitrary code execution. Systems using affected versions of gdk-pixbuf or glib for image processing are vulnerable.

💻 Affected Systems

Products:

gdk-pixbuf
glib

Versions: Specific versions not provided in CVE description; check Red Hat advisories for affected ranges.

Operating Systems: Linux distributions using affected gdk-pixbuf/glib versions (Red Hat, Fedora, Ubuntu, etc.)

Default Config Vulnerable: ⚠️ Yes

Notes: Any application using gdk-pixbuf for JPEG processing or glib for Base64 encoding of JPEG data is vulnerable when handling malicious images.

⚠️ Manual Verification Required

This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.

Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).

🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.

Recommended Actions:

Review the CVE details at NVD
Check vendor security advisories for your specific version
Test if the vulnerability is exploitable in your environment
Consider updating to the latest version as a precaution

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution with the privileges of the application processing the image, potentially leading to full system compromise.

🟠

Likely Case

Application crashes (denial of service) when processing malicious images, with code execution being more difficult to achieve reliably.

🟢

If Mitigated

Limited impact if applications run with minimal privileges, have memory protections (ASLR), or don't process untrusted images.

🌐 Internet-Facing: MEDIUM - Applications that accept image uploads from untrusted sources (web apps, email clients) are at risk, but exploitation requires specific conditions.

🏢 Internal Only: LOW - Internal systems typically process trusted images, though malicious insiders or compromised internal systems could exploit this.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ⚠️ Yes

Complexity: MEDIUM

Exploitation requires crafting a malicious JPEG image and getting it processed by vulnerable software. Heap manipulation for reliable code execution is complex.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Check Red Hat advisories for specific patched versions (e.g., gdk-pixbuf2-2.42.10-1.el9_4).

Vendor Advisory: https://access.redhat.com/errata/RHSA-2025:12841

Restart Required: Yes

Instructions:

1. Update gdk-pixbuf and glib packages using your distribution's package manager. 2. For Red Hat systems: 'sudo yum update gdk-pixbuf2 glib2'. 3. Restart affected applications or the system.

🔧 Temporary Workarounds

Disable JPEG processing in vulnerable applications

linux

Configure applications to avoid using gdk-pixbuf for JPEG images or disable image processing features.

Application-specific configuration; no universal command.

Use alternative image libraries

linux

Replace gdk-pixbuf with other image processing libraries that aren't vulnerable.

Recompile applications with different libraries; consult application documentation.

🧯 If You Can't Patch

Restrict image uploads to trusted sources only.
Run vulnerable applications with reduced privileges (e.g., sandboxing, containers).

🔍 How to Verify

Check if Vulnerable:

Check installed gdk-pixbuf and glib versions against patched versions in Red Hat advisories.

Check Version:

rpm -q gdk-pixbuf2 glib2

Verify Fix Applied:

Verify updated package versions: 'rpm -q gdk-pixbuf2 glib2' and compare to patched versions.

📡 Detection & Monitoring

Log Indicators:

Application crashes or segmentation faults when processing JPEG images.
Unexpected memory access errors in system logs.

Network Indicators:

Unusual image uploads to web applications or services.

SIEM Query:

Search for process crashes related to gdk-pixbuf or applications using it, e.g., 'process.name:gdk-pixbuf AND event.type:crash'.

📊 Metadata

CVE ID: CVE-2025-7345

CVSS v3 Score: 7.5 (HIGH)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE: CWE-120

EPSS Score: 0.26% exploit probability (49.2th percentile)

Published: July 8, 2025

Last Updated: November 3, 2025

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