A flaw was found in the ZBar barcode reader library. A heap-buffer-overflow write of one byte occurs when processing Structured-Append QR codes where the buffer size calculation does not account for NUL separator bytes inserted between decoded segments. An attacker could exploit this by crafting a QR code image that, when scanned by an application using zbar, causes heap corruption leading to a denial of service (application crash).
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History
Tue, 22 Sep 2026 12:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A flaw was found in the ZBar barcode reader library. A heap-buffer-overflow write of one byte occurs when processing Structured-Append QR codes where the buffer size calculation does not account for NUL separator bytes inserted between decoded segments. An attacker could exploit this by crafting a QR code image that, when scanned by an application using zbar, causes heap corruption leading to a denial of service (application crash). | |
| Title | zbar: zbar: heap-buffer-overflow write in Structured-Append QR text extraction | |
| Weaknesses | CWE-787 | |
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threat_severity
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cvssV3_1
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Updated: 2026-09-22T13:30:17Z
Weaknesses