MGASA-2026-0378

    Dashboard / Vulnerabilities / MGASA-2026-0378

    MGASA-2026-0378

    Published: 5 Sept 2026Last Modified: 5 Sept 2026

    Summary: Updated mingw-expat & expat packages fix security vulnerabilities

    Details: Expat Denial of Service via storeAtts() Quadratic Complexity. (CVE-2026-66046) Expat Out-of-Bounds Read via dtdCopy. (CVE-2026-76641) In libexpat 2.8.2 and 2.8.3 before 2.8.4, misinterpretation of getentropy's return code leads to insufficient entropy, which results in being vulnerable to hash flooding attacks, causing a denial of service via crafted XML content. (CVE-2026-76956) libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, a use-after-free can occur. (CVE-2026-76957)

    References: https://advisories.mageia.org/MGASA-2026-0378.html, https://bugs.mageia.org/show_bug.cgi?id=36233, https://www.openwall.com/lists/oss-security/2026/08/31/13, https://blog.hartwork.org/posts/expat-2-8-4-released/, https://github.com/libexpat/libexpat/blob/R_2_8_4/expat/Changes, https://nvd.nist.gov/vuln/detail/cve-2026-66046, https://nvd.nist.gov/vuln/detail/cve-2026-76641, https://nvd.nist.gov/vuln/detail/cve-2026-76956, https://nvd.nist.gov/vuln/detail/cve-2026-76957

    Affected packages

    Package

    Name: mingw-expat

    Purl: pkg:rpm/mageia/mingw-expat?arch=source&distro=mageia-10

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.8.4-1.mga10

    Affected versions

    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
    MGASA-2026-0378 | CVE-DB