CVE-2026-120244

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    CVE-2026-120244

    Published: 1 Nov 2026Last Modified: 4 Nov 2026

    Summary: FFmpeg 2.1 through 9.0.2 Uninitialized Memory Leak via PCX Decoder

    Details: FFmpeg 2.1 through 9.0.2 contains a use of uninitialized resource vulnerability in the PCX decoder that allows attackers to leak heap memory through truncated RLE scanlines. Attackers can craft a PCX image whose RLE data ends early, causing pcx_decode_frame() to copy uninitialized av_malloc() buffer contents into visible decoded pixels.

    References: https://code.ffmpeg.org/FFmpeg/FFmpeg, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/120xxx/CVE-2026-120244.json, https://nvd.nist.gov/vuln/detail/CVE-2026-120244, https://www.vulncheck.com/advisories/ffmpeg-2.1-through-9.0.2-uninitialized-memory-leak-via-pcx-decoder, https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24868, https://github.com/FFmpeg/FFmpeg/commit/ecd5dfc308a164757e7f25b1afefd8db21b43cf9, https://github.com/FFmpeg/FFmpeg, https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/pcx.c#L45-L59

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- a37e42b3ee4226a4d2c69cd4eebf9c81e6df8ea5
    Fixed -ecd5dfc308a164757e7f25b1afefd8db21b43cf9

    Affected versions

    n9.1-dev

    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