CVE-2026-89625

Full vulnerability record from the local CVENow database.

Description

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.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-11 20:19:47.890000

Last modified

2026-10-30 13:20:22.903000

View original CVE JSON

{
  "id": "CVE-2026-89625",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-11T20:19:47.890",
  "lastModified": "2026-10-30T13:20:22.903",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: sony: fix UAF of ghl_poke_timer / ghl_urb at driver unbind\n\nFor 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().\n\nsony_remove() drained the timer with timer_delete_sync() and then freed\nthe URB with usb_free_urb():\n\n\ttimer_delete_sync(&sc->ghl_poke_timer);\n\tusb_free_urb(sc->ghl_urb);\n\ntimer_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.\n\nPoison 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.\n\nReproduced 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:\n\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)\n\nFound by 0sec (https://0sec.ai) using automated source analysis."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/hid/hid-sony.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "cc894ac553605c9193a7a94372ff2f8af5766f46",
              "lessThan": "9405e50a64b07d9c6216381d7eac5373e8ce5077",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "cc894ac553605c9193a7a94372ff2f8af5766f46",
              "lessThan": "8c18db1d6618b37efdb819e35a44d16bfabf171b",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "cc894ac553605c9193a7a94372ff2f8af5766f46",
              "lessThan": "56ef23198bdd51644372b1a9917802544b30987a",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "cc894ac553605c9193a7a94372ff2f8af5766f46",
              "lessThan": "0e3d42ef008f0931e3878b4f1b046b6e45a95bde",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "cc894ac553605c9193a7a94372ff2f8af5766f46",
              "lessThan": "114a58640aaf3c2eb97b5b01c75ab5e541d15d9c",
              "versionType": "git",
              "status": "affected"
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            {
              "version": "cc894ac553605c9193a7a94372ff2f8af5766f46",
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              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "cc894ac553605c9193a7a94372ff2f8af5766f46",
              "lessThan": "a26705bd2e2728833e7a538ce91e58a5eeff496a",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/hid/hid-sony.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "5.11",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "5.11",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.15.224",
              "lessThanOrEqual": "5.15.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.191",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.160",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.111",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.50",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.4",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0e3d42ef008f0931e3878b4f1b046b6e45a95bde",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    },
    {
      "url": "https://git.kernel.org/stable/c/3155dc327344d286f17345cd371be05e255a4328",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
      "url": "https://git.kernel.org/stable/c/56ef23198bdd51644372b1a9917802544b30987a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
      "url": "https://git.kernel.org/stable/c/8c18db1d6618b37efdb819e35a44d16bfabf171b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
      "url": "https://git.kernel.org/stable/c/9405e50a64b07d9c6216381d7eac5373e8ce5077",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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}