DEBIAN-CVE-2026-18238

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    DEBIAN-CVE-2026-18238

    Published: 5 Sept 2026Last Modified: 15 Sept 2026
    Upstream:
    CVE-2026-18238

    Summary:

    Details: The rpcap client code that processes a RPCAP_MSG_PACKET message received from the server incorrectly validates its headers. A malicious server can send a crafted message and cause the client to treat up to 20 bytes of the client process memory beyond the end of the buffer as if it was a part of the captured packet.

    References: https://security-tracker.debian.org/tracker/CVE-2026-18238

    Affected packages

    Package

    Name: libpcap

    Purl: pkg:deb/debian/libpcap?arch=source&distro=bookworm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.10.3-1
    1.10.4-1
    1.10.4-2
    1.10.4-3
    1.10.4-4
    1.10.4-4.1
    1.10.4-4.1~exp1
    1.10.4-5
    1.10.4-5+hurd.1
    1.10.5-1
    1.10.5-2
    1.10.6-1
    1.10.6-2
    1.10.7-1

    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
    DEBIAN-CVE-2026-18238 | CVE-DB