CVE-2026-121942
ZBar through 0.23.95 Out-of-Bounds Read via _zbar_sq_decode() in sqcode.c
CVSS Score
6.1
EPSS Score
0.0%
EPSS Percentile
0th
ZBar through 0.23.95 contains an out-of-bounds read vulnerability in _zbar_sq_decode() in zbar/sqcode.c that allows attackers to read heap memory outside the image buffer via crafted SQ code images. Attackers can supply an image with a skewed SQ code finder pattern near the edge, producing unchecked sample coordinates that crash the decoder and leak bytes into output.
| CWE | CWE-125 |
| Vendor | mchehab |
| Product | zbar |
| Published | Nov 4, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Affected Versions
mchehab / zbar
0 ≤ 0.23.95
References
github.com: https://github.com/mchehab/zbar/issues/351 hackmd.io: https://hackmd.io/@haindpwn/zbar-sqcode-sampling-oob-read github.com: https://github.com/mchehab/zbar/blob/0.23.95/zbar/sqcode.c#L529-L567 vulncheck.com: https://www.vulncheck.com/advisories/zbar-through-0.23.95-out-of-bounds-read-via-zbar-sq-decode-in-sqcode-c
Credits
HaiND from the Post and Telecommunication Institute of Technology