CVE-2026-121942
ZBar through 0.23.95 Out-of-Bounds Read via _zbar_sq_decode() in sqcode.c
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| zbar mchehab mchehab/zbar
github |
≥ 0; ≤ 0.23.95 (affected, semver)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 6.9 medium |
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 6.1 medium |
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H | CNA: VulnCheck |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/mchehab/zbar/issues/351CNA: VulnCheck · issue-tracking
- https://hackmd.io/@haindpwn/zbar-sqcode-sampling-oob-readCNA: VulnCheck · third-party-advisory
- https://github.com/mchehab/zbar/blob/0.23.95/zbar/sqcode.c#L529-L567CNA: VulnCheck · technical-description
- https://www.vulncheck.com/advisories/zbar-through-0.23.95-out-of-bounds-read-via-zbar-sq-decode-in-sqcode-cCNA: VulnCheck · third-party-advisory
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