Bug 2451669 (CVE-2026-4887)

Summary: CVE-2026-4887 gimp: GIMP:Memory disclosure and denial of service via specially crafted PCX image
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: security-response-team
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in GIMP. This issue is a heap buffer over-read in GIMP PCX file loader due to an off-by-one error. A remote attacker could exploit this by convincing a user to open a specially crafted PCX image. Successful exploitation could lead to out-of-bounds memory disclosure and a possible application crash, resulting in a Denial of Service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2451671    
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Description OSIDB Bzimport 2026-03-26 11:34:44 UTC 
This issue is a heap buffer over-read in GIMP’s PCX file loader due to an off‑by‑one error in the bytesperline validation logic. A specially crafted PCX image can cause GIMP to read beyond the bounds of a heap buffer when opened, leading to out‑of‑bounds memory disclosure and possible crash. Exploitation requires user interaction (opening a malicious PCX file)