Medium [CVE-2026-78475] Gimp: unbounded stack vla and 21-byte stack over-read in pix (esm) loader
This medium-severity Red Hat Linux advisory covers CVE-2026-78475 affecting Red Hat Enterprise Linux 9, Red Hat package: gimp-libs, Red Hat package: gimp.src.
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Summary
A flaw was found in the file-pix (ESM) plugin in GIMP. When processing a specially crafted PIX image file, the plugin allocates a Variable-Length Array (VLA) on the stack without proper bounds checking, causing an unbounded stack allocation followed by a 21-byte stack over-read.
This can result in a denial of service due to stack exhaustion and a limited information disclosure of stack memory contents into an intermediate file. To exploit this vulnerability, an attacker needs to convince a user to process a specially crafted PIX image with GIMP, reducing the likelihood of exploitation.
Due to this reason, this flaw has been rated with a moderate severity. Red Hat severity: Moderate — CVSS 6.1 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H).
Weakness: CWE-125. Affected Red Hat products: Red Hat Enterprise Linux 9.
Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: gimp-libs; Red Hat package: gimp.src.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 3 hours ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 3 hours ago·verify at source
Mitigation checklist
- To mitigate this vulnerability, do not open PIX files from untrusted sources with GIMP.
Official advisory · high-confidence parse· fetched 3 hours ago·verify at source
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