In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
HID: sony: fix UAF of ghl_poke_timer \/ ghl_urb at driver unbind<\/p>\n
For GHL (Guitar Hero Live) dongles, sony_probe() arms a periodic timer:
\nghl_magic_poke() (the timer callback) submits sc->ghl_urb, and the URB
\ncompletion ghl_magic_poke_cb() re-arms the timer with mod_timer().<\/p>\n
sony_remove() drained the timer with timer_delete_sync() and then freed
\nthe URB with usb_free_urb():<\/p>\n
\ttimer_delete_sync(&sc->ghl_poke_timer);
\n\tusb_free_urb(sc->ghl_urb);<\/p>\n
timer_delete_sync() does not block re-arming, and while the URB is in
\nflight the timer is not pending, so the sync delete is a no-op. A URB
\ncompletion that runs after the delete re-arms the timer, and usb_free_urb()
\nonly drops a reference — it does not kill an in-flight URB. sc is
\nallocated with devm_kzalloc() and freed once sony_remove() returns, so the
\nre-armed ghl_poke_timer (embedded in sc) then fires on freed memory, a
\nuse-after-free from timer softirq. This is a disconnect\/rmmod race.<\/p>\n
Poison the URB first, then shut the timer down, before freeing the URB.
\nusb_poison_urb() kills any in-flight URB and permanently rejects further
\nsubmissions, so a poke timer that is still pending cannot re-submit the
\nURB from ghl_magic_poke() in the window before timer_shutdown_sync() runs.
\nusb_kill_urb() would not suffice: it only cancels the in-flight URB and
\nleaves it submittable once it returns, so the pending timer could
\nre-submit it and put a fresh URB in flight over the freed sc.
\ntimer_shutdown_sync() then drains any last callback and blocks re-arming.
\nThe probe error path is unaffected: it is only reached before the timer
\nis armed.<\/p>\n
Reproduced under KASAN on next-20260710 via dummy_hcd + raw-gadget
\nemulation of the GHL PS4 dongle (VID 0x1430 \/ PID 0x07bb): hid-sony binds
\nand arms the poke timer, the poke URB is held in flight, the driver is
\nunbound (freeing sc), then the URB is released. The completion re-arms the
\ntimer on the freed sc, and the re-armed timer fires ~8 s later:<\/p>\n
BUG: KASAN: slab-use-after-free in ghl_magic_poke+0x98\/0xb0
\n Read of size 8 at addr ffff88810b02fd50 by task swapper\/0\/0
\n ghl_magic_poke+0x98\/0xb0
\n call_timer_fn+0x35\/0x2b0
\n __run_timers+0x69c\/0x9a0
\n run_timer_softirq+0x173\/0x2a0
\n Allocated by task 169: sony_probe
\n Freed by task 338: devres_release_group <- hid_device_remove (sony_remove)<\/p>\n
Found by 0sec (https:\/\/0sec.ai) using automated source analysis.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
HID: sony: fix UAF of ghl_poke_timer \/ ghl_urb at driver unbind<\/p>\n
For GHL (Guitar Hero Live) dongles, sony_probe() arms a periodic t<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21547","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21547","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=21547"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21547"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21547"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}