CVE-2026-99269

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    CVE-2026-99269

    Published: 3 Nov 2026Last Modified: 5 Nov 2026

    Summary: sched_ext: Wait for SCX_OPSS_DISPATCHING before moving tasks off DSQs

    Details: In the Linux kernel, the following vulnerability has been resolved: sched_ext: Wait for SCX_OPSS_DISPATCHING before moving tasks off DSQs A task can be found on a non-local DSQ while the CPU which dispatched it is still running ops.dequeue() and hasn't cleared SCX_OPSS_DISPATCHING. The DSQ consume and move paths don't wait for the dispatch to finish and can operate on the task concurrently with the dispatcher. Call scx_wait_dispatching() in scx_move_local_task_to_local_dsq(), unlink_dsq_and_switch_rq_lock() and move_task_between_dsqs() before they operate on the task. In scx_move_local_task_to_local_dsq(), wait before scx_resolve_local_dsq() as it may update p->scx.flags.

    References: https://git.kernel.org/stable/c/2935062be77113c1c4565ca9d0c72180449aafee, https://git.kernel.org/stable/c/cc2839946328c1618b3870d521b32bb9483d49d0, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99269.json, https://nvd.nist.gov/vuln/detail/CVE-2026-99269, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- ebf1ccff79c43f860cbd2f9d6cfab9a462d0cb2d
    Fixed -cc2839946328c1618b3870d521b32bb9483d49d0

    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-2026-99269 | CVE-DB