CVE-2026-121942

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{"bugzilla": {"description": "zbar: zbar: Denial of Service via crafted SQ code image", "id": "2566872", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2566872"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in zbar. An attacker could exploit this vulnerability by enticing a user to process a specially crafted SQ code image. During decoding, unchecked coordinates near image boundaries trigger an out-of-bounds memory read. This flaw allows an attacker to crash the application, resulting in a Denial of Service (DoS), or potentially disclose sensitive memory data."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-121942", "public_date": "2026-11-04T12:31:20Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-121942\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-121942\nhttps://github.com/mchehab/zbar/blob/0.23.95/zbar/sqcode.c#L529-L567\nhttps://github.com/mchehab/zbar/issues/351\nhttps://hackmd.io/@haindpwn/zbar-sqcode-sampling-oob-read\nhttps://www.vulncheck.com/advisories/zbar-through-0.23.95-out-of-bounds-read-via-zbar-sq-decode-in-sqcode-c"], "statement": "This vulnerability is rated as Moderate impact because successful exploitation requires user interaction to process an untrusted, specially crafted image file and primarily results in application termination or limited memory disclosure rather than arbitrary code execution. While the library is consumed by applications decoding matrix codes, it is not enabled as an exposed network service by default in Red Hat environments, restricting the blast radius to the local application handling the input. Consequently, privilege boundaries remain intact and impact is limited to temporary denial of service or potential leakage of heap contents.", "threat_severity": "Moderate"}

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