UBUNTU-CVE-2026-93011

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    UBUNTU-CVE-2026-93011

    Published: 29 Oct 2026Last Modified: 5 Nov 2026
    Upstream:
    CVE-2026-93011

    Summary:

    Details: A flaw was found in dnsmasq. After a reduction of internal domain-name buffer sizes, the DNSSEC validator can write a few bytes past a name buffer when converting names to and from DNS wire format. An attacker who can cause the server to validate a crafted DNSSEC response may overwrite a small amount of adjacent heap metadata. DNSSEC support is not compiled in by default and must also be enabled at runtime.

    References: https://ubuntu.com/security/CVE-2026-93011, https://www.cve.org/CVERecord?id=CVE-2026-93011, https://access.redhat.com/security/cve/CVE-2026-93011, https://bugzilla.redhat.com/show_bug.cgi?id=2536082

    Affected packages

    Package

    Name: dnsmasq

    Purl: pkg:deb/ubuntu/dnsmasq?arch=source&distro=esm-infra-legacy%2Ftrusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    2.66-4ubuntu1

    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-2026-93011 | CVE-DB