CVE-2026-34548

// Conceptual Proof of Concept for the Integer Conversion Issue // This code demonstrates how a negative signed integer is implicitly converted // to an unsigned integer, leading to logic errors or crashes. #include <stdio.h> #include <stdint.h> // Simulating the vulnerable logic in iccToXml void parse_icc_tag(int tag_size) { // Vulnerability: Implicit conversion of signed int to unsigned 32-bit int uint32_t buffer_size = tag_size; printf("Input (signed): %d\n", tag_size); printf("Converted (unsigned): %u\n", buffer_size); // If the converted value is used for allocation or looping, it causes UB/DoS if (buffer_size > 0xFFFFFFF) { printf("[!] Exploit Triggered: Value is too large/negative converted to huge positive.\n"); // In a real scenario, this might lead to an allocation failure or buffer overflow // causing a Denial of Service (Availability Impact: High). } } int main() { // Attack vector: Passing a negative value to the function printf("--- Testing CVE-2026-34548 Scenario ---\n"); parse_icc_tag(-1); return 0; }

{"cve": {"id": "CVE-2026-34548", "sourceIdentifier": "[email protected]", "published": "2026-03-31T23:17:09.607", "lastModified": "2026-04-20T14:32:53.423", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "iccDEV provides a set of libraries and tools for working with ICC color management profiles. Prior to version 2.3.1.6, there is an Undefined Behavior (UB) condition in the XML conversion tooling path (iccToXml) caused by an implicit conversion from a negative signed integer to icUInt32Number (unsigned 32-bit), which changes the value. This issue has been patched in version 2.3.1.6."}, {"lang": "es", "value": "iccDEV proporciona un conjunto de bibliotecas y herramientas para trabajar con perfiles de gestión de color ICC. Antes de la versión 2.3.1.6, existe una condición de Comportamiento Indefinido (UB) en la ruta de la herramienta de conversión XML (iccToXml) causada por una conversión implícita de un entero con signo negativo a icUInt32Number (entero sin signo de 32 bits), lo que cambia el valor. Este problema ha sido parcheado en la versión 2.3.1.6."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 6.2, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.5, "impactScore": 3.6}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-681"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:color:iccdev:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.3.1.6", "matchCriteriaId": "DE133F29-9592-4669-8B76-9F7C88EFE17D"}]}]}], "references": [{"url": "https://github.com/InternationalColorConsortium/iccDEV/issues/722", "source": "[email protected]", "tags": ["Issue Tracking", "Exploit"]}, {"url": "https://github.com/InternationalColorConsortium/iccDEV/pull/725", "source": "[email protected]", "tags": ["Issue Tracking", "Patch"]}, {"url": "https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-prwp-9gv6-ccxv", "source": "[email protected]", "tags": ["Patch", "Vendor Advisory"]}]}}