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CVE-2026-89625: Linux

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CVSS

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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: HID: sony: fix UAF of ghl_poke_timer / ghl_urb at driver unbind For GHL (Guitar Hero Live) dongles, sony_probe() arms a periodic timer: ghl_magic_poke() (the timer callback) submits sc->ghl_urb, and the URB completion ghl_magic_poke_cb() re-arms the timer with mod_timer(). sony_remove() drained the timer with timer_delete_sync() and then freed the URB with usb_free_urb(): timer_delete_sync(&sc->ghl_poke_timer); usb_free_urb(sc->ghl_urb); timer_delete_sync() does not block re-arming, and while the URB is in flight the timer is not pending, so the sync delete is a no-op. A URB completion that runs after the delete re-arms the timer, and usb_free_urb() only drops a reference -- it does not kill an in-flight URB. sc is allocated with devm_kzalloc() and freed once sony_remove() returns, so the re-armed ghl_poke_timer (embedded in sc) then fires on freed memory, a use-after-free from timer softirq. This is a disconnect/rmmod race. Poison the URB first, then shut the timer down, before freeing the URB. usb_poison_urb() kills any in-flight URB and permanently rejects further submissions, so a poke timer that is still pending cannot re-submit the URB from ghl_magic_poke() in the window before timer_shutdown_sync() runs. usb_kill_urb() would not suffice: it only cancels the in-flight URB and leaves it submittable once it returns, so the pending timer could re-submit it and put a fresh URB in flight over the freed sc. timer_shutdown_sync() then drains any last callback and blocks re-arming. The probe error path is unaffected: it is only reached before the timer is armed. Reproduced under KASAN on next-20260710 via dummy_hcd + raw-gadget emulation of the GHL PS4 dongle (VID 0x1430 / PID 0x07bb): hid-sony binds and arms the poke timer, the poke URB is held in flight, the driver is unbound (freeing sc), then the URB is released. The completion re-arms the timer on the freed sc, and the re-armed timer fir

    Засегнати продукти

    • Linux Linux: cc894ac553605c9193a7a94372ff2f8af5766f46 преди 9405e50a64b07d9c6216381d7eac5373e8ce5077; cc894ac553605c9193a7a94372ff2f8af5766f46 преди 8c18db1d6618b37efdb819e35a44d16bfabf171b; cc894ac553605c9193a7a94372ff2f8af5766f46 преди 56ef23198bdd51644372b1a9917802544b30987a; cc894ac553605c9193a7a94372ff2f8af5766f46 преди 0e3d42ef008f0931e3878b4f1b046b6e45a95bde; cc894ac553605c9193a7a94372ff2f8af5766f46 преди 114a58640aaf3c2eb97b5b01c75ab5e541d15d9c; cc894ac553605c9193a7a94372ff2f8af5766f46 преди 3155dc327344d286f17345cd371be05e255a4328; cc894ac553605c9193a7a94372ff2f8af5766f46 преди a26705bd2e2728833e7a538ce91e58a5eeff496a
    • Linux Linux: 5.11; преди 5.11; 5.15.224 до 5.15.*; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.111 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; от 7.3 нататък

    История

    • 11 септември 2026 Публикувано

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    CVE-2026-89625: Linux | freedomonline.bg