HID: sony: fix UAF of ghl_poke_timer / ghl_urb at driver unbind

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Summary

CVECVE-2026-89625
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:19:47 UTC
Updated2026-09-11 20:19:47 UTC
DescriptionIn 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 fires ~8 s later: BUG: KASAN: slab-use-after-free in ghl_magic_poke+0x98/0xb0 Read of size 8 at addr ffff88810b02fd50 by task swapper/0/0 ghl_magic_poke+0x98/0xb0 call_timer_fn+0x35/0x2b0 __run_timers+0x69c/0x9a0 run_timer_softirq+0x173/0x2a0 Allocated by task 169: sony_probe Freed by task 338: devres_release_group <- hid_device_remove (sony_remove) Found by 0sec (https://0sec.ai) using automated source analysis.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected cc894ac553605c9193a7a94372ff2f8af5766f46 114a58640aaf3c2eb97b5b01c75ab5e541d15d9c git Not specified
CNA Linux Linux affected cc894ac553605c9193a7a94372ff2f8af5766f46 3155dc327344d286f17345cd371be05e255a4328 git Not specified
CNA Linux Linux affected cc894ac553605c9193a7a94372ff2f8af5766f46 a26705bd2e2728833e7a538ce91e58a5eeff496a git Not specified
CNA Linux Linux affected 5.11 Not specified
CNA Linux Linux unaffected 5.11 semver Not specified
CNA Linux Linux unaffected 6.18.50 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/a26705bd2e2728833e7a538ce91e58a5eeff496a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3155dc327344d286f17345cd371be05e255a4328 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/114a58640aaf3c2eb97b5b01c75ab5e541d15d9c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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