CVE-2026-120458

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    CVE-2026-120458

    Published: 2 Nov 2026Last Modified: 8 Nov 2026

    Summary: Kvazaar through 2.3.2 Infinite Loop DoS via Y4M Header Parser

    Details: Kvazaar through 2.3.2 contains an infinite loop vulnerability in read_header() in src/encmain.c that allows attackers to hang the command-line encoder by supplying a truncated Y4M header. Attackers can provide a crafted .y4m file lacking a terminating newline, causing unchecked EOF reads that hang the process indefinitely while consuming a full CPU core.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/120xxx/CVE-2026-120458.json, https://github.com/ultravideo/kvazaar/releases/tag/v2.3.2, https://nvd.nist.gov/vuln/detail/CVE-2026-120458, https://www.vulncheck.com/advisories/kvazaar-through-2.3.2-infinite-loop-dos-via-y4m-header-parser, https://github.com/ultravideo/kvazaar/issues/452, https://github.com/ultravideo/kvazaar/commit/8a2f109be283e87008c679d635966cc034da39c6, https://github.com/ultravideo/kvazaar, https://github.com/ultravideo/kvazaar/blob/v2.3.2/src/encmain.c#L339-L357, https://hackmd.io/@haindpwn/kvazaar-y4m-header-missing-newline-infinite-loop, https://hackmd.io/@haindpwn/cve-2026-120458-kvazaar-y4m-header-missing-newline-infinite-loop

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -8a2f109be283e87008c679d635966cc034da39c6

    Affected versions

    v2.3.1
    v2.3.0

    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-2026-120458 | CVE-DB