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CVE-2026-23047: Linux

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: libceph: make calc_target() set t->paused, not just clear it Currently calc_target() clears t->paused if the request shouldn't be paused anymore, but doesn't ever set t->paused even though it's able to determine when the request should be paused. Setting t->paused is left to __submit_request() which is fine for regular requests but doesn't work for linger requests -- since __submit_request() doesn't operate on linger requests, there is nowhere for lreq->t.paused to be set. One consequence of this is that watches don't get reestablished on paused -> unpaused transitions in cases where requests have been paused long enough for the (paused) unwatch request to time out and for the subsequent (re)watch request to enter the paused state. On top of the watch not getting reestablished, rbd_reregister_watch() gets stuck with rbd_dev->watch_mutex held: rbd_register_watch __rbd_register_watch ceph_osdc_watch linger_reg_commit_wait It's waiting for lreq->reg_commit_wait to be completed, but for that to happen the respective request needs to end up on need_resend_linger list and be kicked when requests are unpaused. There is no chance for that if the request in question is never marked paused in the first place. The fact that rbd_dev->watch_mutex remains taken out forever then prevents the image from getting unmapped -- "rbd unmap" would inevitably hang in D state on an attempt to grab the mutex.

    Засегнати продукти

    • Linux Linux: 922dab6134178cae317ae00de86376cba59f3147 преди 2b3329b3c29d9e188e40d902d5230c2d5989b940; 922dab6134178cae317ae00de86376cba59f3147 преди 5d0dc83cb9a69c1d0bea58f1c430199b05f6b021; 922dab6134178cae317ae00de86376cba59f3147 преди 4d3399c52e0e61720ae898f5a0b5b75d4460ae24; 922dab6134178cae317ae00de86376cba59f3147 преди 4ebc711b738d139cabe2fc9e7e7749847676a342; 922dab6134178cae317ae00de86376cba59f3147 преди 6f468f6ff233c6a81e0e761d9124e982903fe9a5; 922dab6134178cae317ae00de86376cba59f3147 преди 5647d42c47b535573b63e073e91164d6a5bb058c; 922dab6134178cae317ae00de86376cba59f3147 преди c0fe2994f9a9d0a2ec9e42441ea5ba74b6a16176
    • Linux Linux: 4.7; преди 4.7; 5.10.248 до 5.10.*; 5.15.198 до 5.15.*; 6.1.161 до 6.1.*; 6.6.121 до 6.6.*; 6.12.66 до 6.12.*; 6.18.6 до 6.18.*; от 6.19 нататък

    История

    • 4 февруари 2026 Публикувано

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    CVE-2026-23047: Linux | freedomonline.bg