Bug 2542873 (CVE-2026-88371)

Summary: CVE-2026-88371 zbar: zbar: Denial of Service via crafted Code 128 barcode input
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in zbar. An attacker could exploit this vulnerability by providing specially crafted Code 128 barcode input to an application using the library. During decoding, improper handling of invalid edge patterns triggers an invalid arithmetic operation, which can terminate the process and lead to a Denial of Service (DoS).
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Bug Depends On: 2543002, 2543003    
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Description OSIDB Bzimport 2026-09-28 22:52:29 UTC 
ZBar commit 2ea2ca58 contains an undefined-behavior vulnerability in the Code 128 decode6() function. When processing specially crafted Code 128 input, decode_e() can return -1 for an invalid edge pattern, and decode6() subsequently left-shifts this negative signed value while constructing the edge signature. The operation invokes undefined behavior and can terminate trap-mode UBSan builds with SIGILL, resulting in denial of service.