---
id: CVE-2026-89625
title: |-
  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 cal…
summary: |-
  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 cal…
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-364
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= cc894ac553605c9193a7a94372ff2f8af5766f46 <
    0e3d42ef008f0931e3878b4f1b046b6e45a95bde
  - >-
    Linux >= cc894ac553605c9193a7a94372ff2f8af5766f46 <
    114a58640aaf3c2eb97b5b01c75ab5e541d15d9c
  - >-
    Linux >= cc894ac553605c9193a7a94372ff2f8af5766f46 <
    3155dc327344d286f17345cd371be05e255a4328
  - >-
    Linux >= cc894ac553605c9193a7a94372ff2f8af5766f46 <
    a26705bd2e2728833e7a538ce91e58a5eeff496a
  - Linux 5.11
published: '2026-09-11'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T14:17:24.270'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89625'
references:
  - url: 'https://git.kernel.org/stable/c/0e3d42ef008f0931e3878b4f1b046b6e45a95bde'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/114a58640aaf3c2eb97b5b01c75ab5e541d15d9c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3155dc327344d286f17345cd371be05e255a4328'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a26705bd2e2728833e7a538ce91e58a5eeff496a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89625.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89625'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532355'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89625'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89625'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89625.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00209
epssPercentile: 0.09743
cvssSource: vendor
ingestedAt: '2026-09-14T11:11:19.885Z'
---

## Overview

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 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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89625.json)