UBUNTU-CVE-2017-17426

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    UBUNTU-CVE-2017-17426

    Published: 5 Dec 2017Last Modified: 4 Feb 2026
    Upstream:
    CVE-2017-17426
    Aliases:
    USN-3534-1

    Summary:

    Details: The malloc function in the GNU C Library (aka glibc or libc6) 2.26 could return a memory block that is too small if an attempt is made to allocate an object whose size is close to SIZE_MAX, potentially leading to a subsequent heap overflow. This occurs because the per-thread cache (aka tcache) feature enables a code path that lacks an integer overflow check.

    References: https://ubuntu.com/security/CVE-2017-17426, https://sourceware.org/bugzilla/show_bug.cgi?id=22375, https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=34697694e8a93b325b18f25f7dcded55d6baeaf6, https://ubuntu.com/security/notices/USN-3534-1, https://www.cve.org/CVERecord?id=CVE-2017-17426

    Affected packages

    Package

    Name: glibc

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=bionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.27-3ubuntu1

    Affected versions

    2.26-0ubuntu2
    2.26-0ubuntu2.1

    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