CVE-2026-121942

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    CVE-2026-121942

    Published: 4 Nov 2026Last Modified: 5 Nov 2026

    Summary: ZBar through 0.23.95 Out-of-Bounds Read via _zbar_sq_decode() in sqcode.c

    Details: 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.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121942.json, https://hackmd.io/@haindpwn/zbar-sqcode-sampling-oob-read, https://nvd.nist.gov/vuln/detail/CVE-2026-121942, https://www.vulncheck.com/advisories/zbar-through-0.23.95-out-of-bounds-read-via-zbar-sq-decode-in-sqcode-c, https://github.com/mchehab/zbar/issues/351, https://github.com/mchehab/zbar, https://github.com/mchehab/zbar/blob/0.23.95/zbar/sqcode.c#L529-L567, https://hackmd.io/@haindpwn/cve-2026-121942-zbar-sqcode-sampling-oob-read

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    0.23.95
    0.23.94
    0.23.93
    0.23.92
    0.23.1
    0.23

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-121942 | CVE-DB