CVE-2026-97185 Overview
CVE-2026-97185 is an out-of-bounds write vulnerability [CWE-787] in the GNU Image Manipulation Program (GIMP). The flaw resides in the GIMPressionist plug-in, which fails to validate vector indices before writing to fixed-size arrays while parsing preset files. An attacker can craft a malicious GIMPressionist preset that corrupts memory when loaded. Successful exploitation can crash the application or enable arbitrary code execution under the user's privileges. Exploitation requires local access and user interaction, since the victim must open the attacker-supplied preset file.
Critical Impact
A specially crafted GIMPressionist preset can trigger memory corruption in GIMP, leading to application crash or arbitrary code execution in the context of the user loading the file.
Affected Products
- GNU Image Manipulation Program (GIMP) — GIMPressionist plug-in
- Linux distributions packaging the affected GIMP release (see Red Hat advisory)
- Any platform shipping GIMP with the GIMPressionist plug-in enabled
Discovery Timeline
- 2026-09-24 - CVE-2026-97185 published to the National Vulnerability Database
- 2026-09-24 - Last updated in NVD database
Technical Details for CVE-2026-97185
Vulnerability Analysis
The GIMPressionist plug-in reads user-supplied preset files that describe brush and stroke configurations through vector-based parameters. During parsing, the plug-in uses indices from the preset to address fixed-size arrays that hold these parameters. The plug-in does not verify that the indices fall within the allocated bounds before performing writes. A preset file containing out-of-range indices causes the plug-in to write attacker-controlled data outside the intended buffer. This memory corruption can overwrite adjacent heap or stack structures, including function pointers and control data used by the GIMP process. Depending on the memory layout, the result ranges from an immediate process crash to arbitrary code execution within the user context.
Root Cause
The root cause is missing input validation on vector indices used to index fixed-size arrays inside the GIMPressionist preset loader. The plug-in trusts values embedded in the preset file and performs writes without range checks, satisfying the conditions for CWE-787 (Out-of-Bounds Write).
Attack Vector
Exploitation requires the victim to open a malicious GIMPressionist preset in GIMP. Delivery vectors include email attachments, download links, shared asset bundles, and compromised preset repositories. Because the attack path is local with required user interaction, mass remote exploitation is unlikely, but targeted social engineering against artists, designers, and content pipelines is feasible.
No verified public proof-of-concept code is available at this time. Technical specifics are documented in the Red Hat CVE-2026-97185 Advisory, Red Hat Bug Report #2539980, and the GNOME GIMP Work Item #16788.
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Stop Exploit AttemptsDetection Methods for CVE-2026-97185
Indicators of Compromise
- Unexpected GIMP process crashes immediately after a user opens a .preset file or imports a GIMPressionist configuration.
- Presence of GIMPressionist preset files received from untrusted sources (email attachments, shared drives, download folders).
- Child processes spawned by gimp or gimp-2.x shortly after preset load, especially shells or scripting interpreters.
Detection Strategies
- Monitor endpoint telemetry for anomalous child processes of the GIMP binary, including sh, bash, python, or network utilities.
- Alert on segmentation faults or abnormal termination of gimp logged in journald, dmesg, or crash reporters such as abrt and apport.
- Inspect GIMPressionist preset files for malformed or out-of-range index fields prior to distribution in managed environments.
Monitoring Recommendations
- Enable process-execution auditing on workstations running GIMP and forward events to a centralized log platform.
- Track file-write events in GIMP configuration directories such as ~/.config/GIMP/*/gimpressionist/ for unexpected or externally sourced presets.
- Review user download and email gateways for preset files originating outside the organization.
How to Mitigate CVE-2026-97185
Immediate Actions Required
- Apply vendor-supplied GIMP updates as soon as patched packages are available from your Linux distribution or GIMP maintainers.
- Instruct users not to open GIMPressionist preset files received from untrusted or unverified sources.
- Audit shared asset repositories and remove preset files of unknown provenance.
Patch Information
Refer to the Red Hat CVE-2026-97185 Advisory for distribution-specific package updates and the GNOME GIMP Work Item #16788 for upstream fix status. Install the patched GIMP release through your platform package manager once available.
Workarounds
- Disable or remove the GIMPressionist plug-in by deleting or renaming the gimpressionist binary in the GIMP plug-ins directory.
- Restrict GIMP execution to least-privileged user accounts to limit the impact of successful exploitation.
- Use file-type filtering at email and web gateways to block delivery of GIMPressionist preset files from external senders.
# Locate and disable the GIMPressionist plug-in (adjust path for your GIMP version)
find / -type f -name 'gimpressionist' 2>/dev/null
sudo mv /usr/lib64/gimp/2.0/plug-ins/gimpressionist/gimpressionist \
/usr/lib64/gimp/2.0/plug-ins/gimpressionist/gimpressionist.disabled
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