Vulnerability · Published Sep 24, 2026 · Assigned by mitre
CVE-2026-88371
Medium 5.5
In plain English
A medium-severity security flaw in the zbar package (Debian). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | zbar | no fix listed | DEBIAN-CVE-2026-88371 |
| Debian:13 | zbar | no fix listed | DEBIAN-CVE-2026-88371 |
| Debian:14 | zbar | 0.23.95-1 | DEBIAN-CVE-2026-88371 |
| Ubuntu:24.04:LTS | zbar | no fix listed | UBUNTU-CVE-2026-88371 |
| Ubuntu:26.04:LTS | zbar | no fix listed | UBUNTU-CVE-2026-88371 |
| Ubuntu:26.10 | zbar | no fix listed | UBUNTU-CVE-2026-88371 |
Affected products (as reported)
Weakness: CWE-682 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H