UBUNTU-CVE-2021-3594

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    UBUNTU-CVE-2021-3594

    Published: 15 Jun 2021Last Modified: 22 Apr 2026
    Upstream:
    CVE-2021-3594
    Aliases:
    USN-5009-1
    USN-5009-2
    USN-5010-1

    Summary:

    Details: An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the udp_input() function and could occur while processing a udp packet that is smaller than the size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0.

    References: https://ubuntu.com/security/CVE-2021-3594, https://ubuntu.com/security/notices/USN-5009-1, https://ubuntu.com/security/notices/USN-5010-1, https://ubuntu.com/security/notices/USN-5009-2, https://www.cve.org/CVERecord?id=CVE-2021-3594, https://ubuntu.com/security/notices/USN-7094-1

    Affected packages

    Package

    Name: qemu

    Purl: pkg:deb/ubuntu/[email protected]+dfsg-2ubuntu1.47+esm4?arch=source&distro=trusty/esm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.0.0+dfsg-2ubuntu1.47+esm4

    Affected versions

    1.5.0+dfsg-3ubuntu5
    1.5.0+dfsg-3ubuntu6

    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
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