UBUNTU-CVE-2026-118593

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    UBUNTU-CVE-2026-118593

    Published: 30 Oct 2026Last Modified: 10 Nov 2026
    Upstream:
    CVE-2026-118593

    Summary:

    Details: A flaw was found in Red Hat Enterprise Linux 9 kernel builds. An incomplete backport of the CVE-2026-46099 fix in RHEL 9.6 through 9.10 left a local_bh imbalance in seg6_input_core(), where the drop path returns with bottom halves still disabled. This can lead to softirq starvation and denial of service on systems with SRv6 tunnels configured. Upstream and RHEL 10 are not affected.

    References: https://ubuntu.com/security/CVE-2026-118593, https://www.cve.org/CVERecord?id=CVE-2026-118593, https://bugzilla.redhat.com/show_bug.cgi?id=2563095, https://access.redhat.com/security/cve/CVE-2026-118593

    Affected packages

    Package

    Name: linux

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    3.11.0-12.19

    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-2026-118593 | CVE-DB