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CVE-2026-89955: Linux

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: s390/vfio-ap: Fix NULL deref in status_show() during queue probe When vfio_ap_mdev_probe_queue() creates the sysfs attribute group, the queue's driver data has not yet been set. A concurrent read of the 'status' attribute can therefore call dev_get_drvdata() and get NULL, which is then passed directly to vfio_ap_mdev_for_queue() where q->apqn is unconditionally dereferenced, causing a NULL pointer dereference. Fix this by acquiring the update locks before calling sysfs_create_group(). The status_show() function acquires guests_lock before reading the driver data, so any concurrent read will block until after dev_set_drvdata() has been called and the update locks are released. As a bonus, the APQN no longer needs to be read from the queue struct after allocation — it can be read directly from apdev before allocation and stored in a local variable, which is then assigned to q->apqn once the allocation succeeds.

    Засегнати продукти

    • Linux Linux: 260f3ea141382386e97611e7c2029bc013088ab1 преди 10606c9af18baed75cd180b96ee695441aa15134; 260f3ea141382386e97611e7c2029bc013088ab1 преди 31fa0a8a3c337ed2d200166d6926ab23c14f8b2e; 260f3ea141382386e97611e7c2029bc013088ab1 преди e102ce0f4af99dff769a4b1b4daa4cc6bd5ad2d9; 260f3ea141382386e97611e7c2029bc013088ab1 преди 69632952aca04caa71e49953b6949fc04e788e67; 260f3ea141382386e97611e7c2029bc013088ab1 преди 7db2511fc601ca3a6e3fb1bdce02261c3c3167c3; 260f3ea141382386e97611e7c2029bc013088ab1 преди dd6f4ef6f8a37412909ad787c837332fb070159c
    • Linux Linux: 6.0; преди 6.0; 6.1.191 до 6.1.*; 6.6.157 до 6.6.*; 6.12.110 до 6.12.*; 6.18.51 до 6.18.*; 7.2.5 до 7.2.*; от 7.3 нататък

    История

    • 16 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-89955: Linux | freedomonline.bg