CVE-2019-18805

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    CVE-2019-18805

    Published: 7 Nov 2019Last Modified: 15 Mar 2026

    Summary:

    Details: An issue was discovered in net/ipv4/sysctl_net_ipv4.c in the Linux kernel before 5.0.11. There is a net/ipv4/tcp_input.c signed integer overflow in tcp_ack_update_rtt() when userspace writes a very large integer to /proc/sys/net/ipv4/tcp_min_rtt_wlen, leading to a denial of service or possibly unspecified other impact, aka CID-19fad20d15a6.

    References: http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00035.html, http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00039.html, https://access.redhat.com/errata/RHSA-2020:0740, https://security.netapp.com/advisory/ntap-20191205-0001/, https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19fad20d15a6494f47f85d869f00b11343ee5c78

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    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
    CVE-2019-18805 | CVE-DB