UBUNTU-CVE-2026-120436

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    UBUNTU-CVE-2026-120436

    Published: 2 Nov 2026Last Modified: 5 Nov 2026
    Upstream:
    CVE-2026-120436

    Summary:

    Details: Netpbm before 10.86.51, 11.x before 11.02.30, and 11.03 before 11.15.08 contains an integer overflow in jbigtopnm that causes heap buffer overflow when computing output buffer size. Attackers can supply a crafted multi-plane JBIG file with large header dimensions so jbg_dec_merge_planes() overflows the undersized buffer, causing crashes or potentially code execution.

    References: https://ubuntu.com/security/CVE-2026-120436, https://www.cve.org/CVERecord?id=CVE-2026-120436, https://sourceforge.net/p/netpbm/code/5324/, https://svn.code.sf.net/p/netpbm/code/!svn/bc/5323/trunk/converter/other/jbig/jbigtopnm.c, https://svn.code.sf.net/p/netpbm/code/!svn/bc/5357/advanced/doc/HISTORY, https://svn.code.sf.net/p/netpbm/code/!svn/bc/5358/stable/doc/HISTORY, https://svn.code.sf.net/p/netpbm/code/!svn/bc/5371/super_stable/doc/HISTORY, https://www.vulncheck.com/advisories/netpbm-before-10.86.51-11.02.30-and-11.15.08-heap-overflow-via-jbigtopnm

    Affected packages

    Package

    Name: netpbm-free

    Purl: pkg:deb/ubuntu/netpbm-free?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    2:10.0-15.2
    2:10.0-15.3

    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
    UBUNTU-CVE-2026-120436 | CVE-DB