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.
References
History

Wed, 07 Oct 2026 10:00:00 +0000

Type Values Removed Values Added
Title ZBar Code 128 Decoder Undefined Behavior Allowing SIGILL Crash

Wed, 07 Oct 2026 08:30:00 +0000

Type Values Removed Values Added
Title Undefined Behavior in ZBar Code 128 Decoder Leads to SIGILL Crash
Weaknesses CWE-20

Wed, 07 Oct 2026 06:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 06 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-682
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}


Sun, 27 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
First Time appeared Mchehab
Mchehab zbar
Vendors & Products Mchehab
Mchehab zbar

Sat, 26 Sep 2026 05:45:00 +0000

Type Values Removed Values Added
Title Undefined Behavior in ZBar Code 128 Decoder Leads to SIGILL Crash
Weaknesses CWE-20

Thu, 24 Sep 2026 16:15:00 +0000

Type Values Removed Values Added
Description 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.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-09-24T00:00:00.000Z

Updated: 2026-10-06T17:42:37.691Z

Reserved: 2026-09-10T00:00:00.000Z

Link: CVE-2026-88371

cve-icon Vulnrichment

Updated: 2026-10-06T15:42:32.192Z

cve-icon NVD

Status : Deferred

Published: 2026-09-24T16:17:14.100

Modified: 2026-10-06T18:16:57.523

Link: CVE-2026-88371

cve-icon Redhat

No data.