CVE-2026-120457

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    CVE-2026-120457

    Published: 2 Nov 2026Last Modified: 7 Nov 2026

    Summary: libaec through 1.1.7 Out-of-Bounds Read via m_se_decode() Second Extension Decoder

    Details: libaec through 1.1.7 contains an out-of-bounds read vulnerability in m_se_decode() in src/decode.c that allows attackers to bypass a signed bounds check via an overlong fundamental sequence. Attackers can supply a crafted CCSDS 121.0/SZIP stream with 2^31 or more zero bits to crash the decoder or leak adjacent memory into decoded samples.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/120xxx/CVE-2026-120457.json, https://github.com/Deutsches-Klimarechenzentrum/libaec/releases/tag/v1.1.7, https://nvd.nist.gov/vuln/detail/CVE-2026-120457, https://www.vulncheck.com/advisories/libaec-through-1.1.7-out-of-bounds-read-via-m-se-decode-second-extension-decoder, https://github.com/Deutsches-Klimarechenzentrum/libaec/issues/64, https://github.com/Deutsches-Klimarechenzentrum/libaec/pull/66, https://github.com/Deutsches-Klimarechenzentrum/libaec, https://github.com/Deutsches-Klimarechenzentrum/libaec/blob/v1.1.7/src/decode.c#L556-L586, https://hackmd.io/@haindpwn/libaec-se-decode-fs-signedness-oob-read

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -0c4c01463d2c64a112a61271d317b74efb660608

    Affected versions

    v1.1.6
    v1.1.5
    v1.1.4
    v1.1.3
    v1.1.2
    v1.1.1

    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-2026-120457 | CVE-DB