PatchSiren cyber security CVE debrief
CVE-2026-42170 Red Hat CVE debrief
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-08T16:16:49.093Z and has not been modified since then. This CVE-2026-42170 vulnerability involves a heap-based buffer overflow in the GIMP DDS file parser. A crafted DDS file can declare a D3D9 pixel format with a lower bits-per-pixel value, leading to an undersized heap buffer allocation. Subsequent pixel data consumption can cause a write past the heap buffer boundary, resulting in heap metadata corruption and potential code execution. Users of GIMP who process DDS files, especially in environments where untrusted files may be opened, are advised to be aware of this vulnerability. GIMP users, security teams, and operators managing GIMP deployments should assess exposure and prioritize patching to prevent potential code execution. Evidence is limited to CVE and NVD details, so users should verify GIMP versions, assess exposure, and monitor for updates.
- Vendor
- Red Hat
- Product
- Red Hat Enterprise Linux 6
- CVSS
- HIGH 7.8
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-08-08
- Original CVE updated
- 2026-08-08
- Advisory published
- 2026-08-08
- Advisory updated
- 2026-08-08
Who should care
Users of GIMP who process DDS files, especially in environments where untrusted files may be opened, should be aware of this vulnerability. GIMP users, security teams, and operators who manage GIMP deployments should assess exposure and prioritize patching to prevent potential code execution. Vulnerability management and security teams should review and implement compensating controls for exposed systems while remediation is scheduled and verified.
Technical summary
A heap-based buffer overflow vulnerability exists in the GIMP DDS file parser. When a crafted DDS file declares a D3D9 pixel format but sets a lower bits-per-pixel (bpp) value in the header, the loader allocates an undersized heap buffer. Subsequent pixel data consumption at the real format's stride causes a write past the heap buffer boundary, leading to heap metadata corruption and potential code execution. This issue may impact GIMP users who process DDS files, especially in environments where untrusted files may be opened.
Defensive priority
GIMP users should prioritize patching to prevent potential code execution.
Recommended defensive actions
- Apply patches or updates provided by GIMP to address the heap-based buffer overflow vulnerability
- Restrict usage of untrusted DDS files
- Monitor GIMP security advisories for further updates
- Review compensating controls for exposed systems while remediation is scheduled and verified
- Check relevant monitoring, detection, and logs for exposed assets that need extra review
- Track exceptions, retest remediated assets, and close the item only after evidence is documented
- Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
Evidence notes
The CVE record indicates a heap-based buffer overflow vulnerability in the GIMP DDS file parser. Limited details are available about affected versions or scope. Users should verify GIMP versions, assess exposure, and monitor for updates. Evidence is limited to CVE and NVD details.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-08T16:16:49.093Z and has not been modified since then.