CVE-2023-40889 (https://hackmd.io/@cspl/B1ZkFZv23): A heap-based buffer overflow exists in the qr_reader_match_centers function of ZBar 0.23.90. Specially crafted QR codes may lead to information disclosure and/or arbitrary code execution. To trigger this vulnerability, an attacker can digitally input the malicious QR code, or prepare it to be physically scanned by the vulnerable scanner. CVE-2023-40890 (https://hackmd.io/@cspl/H1PxPAUnn): A stack-based buffer overflow vulnerability exists in the lookup_sequence function of ZBar 0.23.90. Specially crafted QR codes may lead to information disclosure and/or arbitrary code execution. To trigger this vulnerability, an attacker can digitally input the malicious QR code, or prepare it to be physically scanned by the vulnerable scanner. A third party has reported upstream, and it seems there some potential patches: https://github.com/mchehab/zbar/issues/263
