DEBIAN-CVE-2026-120246

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    DEBIAN-CVE-2026-120246

    Published: 1 Nov 2026Last Modified: 1 Nov 2026
    Upstream:
    CVE-2026-120246

    Summary:

    Details: FFmpeg 4.4 through 9.0.2 contains a use of uninitialized variable vulnerability in the CDXL decoder that leaks stack memory into decoded pixels via unfilled HAM palette entries. Attackers can craft a type-0 CDXL file whose HAM pixels select unfilled new_palette entries in cdxl_decode_ham8() or cdxl_decode_ham6(), exposing stack bytes and pointer fragments in the BGR24 output.

    References: https://security-tracker.debian.org/tracker/CVE-2026-120246

    Affected packages

    Package

    Name: ffmpeg

    Purl: pkg:deb/debian/ffmpeg?arch=source&distro=bookworm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    7:5.1.3-1
    7:5.1.3-2
    7:5.1.4-0+deb12u1
    7:5.1.5-0+deb12u1
    7:5.1.6-0+deb12u1
    7:5.1.7-0+deb12u1
    7:5.1.8-0+deb12u1
    7:5.1.9-0+deb12u1

    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