UBUNTU-CVE-2026-0799

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    UBUNTU-CVE-2026-0799

    Published: 5 Sept 2026Last Modified: 25 Sept 2026
    Upstream:
    CVE-2026-0799
    Aliases:
    USN-8824-1

    Summary:

    Details: In BPF instructions that load/store a value from/to a scratch memory register the register index is an unsigned 32-bit integer and must not exceed 15, but libpcap BPF interpreter does not validate the value. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading and writing the OS process memory in the 16GiB starting at the current stack frame on 64-bit architectures and in the entire address space on 32-bit architectures.

    References: https://ubuntu.com/security/CVE-2026-0799, https://www.cve.org/CVERecord?id=CVE-2026-0799, https://ubuntu.com/security/notices/USN-8824-1

    Affected packages

    Package

    Name: libpcap

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.5.3-2ubuntu0.1+esm1

    Affected versions

    1.4.0-2

    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-2026-0799 | CVE-DB