{"id":"CVE-2026-89625","title":"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 cal…","summary":"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 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":0.00206,"epssPercentile":0.11055,"cvssSource":"vendor","ingestedAt":"2026-09-14T11:11:19.885Z","slug":"CVE-2026-89625","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **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)","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":205490,"id":"CVE-2026-89625","ts":1789576721902,"field":"cvss","old":"5.9","new":"7"},{"seq":205489,"id":"CVE-2026-89625","ts":1789576721902,"field":"severity","old":"medium","new":"high"},{"seq":203990,"id":"CVE-2026-89625","ts":1789490230944,"field":"cvss","old":null,"new":"5.9"},{"seq":203989,"id":"CVE-2026-89625","ts":1789490230944,"field":"severity","old":"none","new":"medium"},{"seq":147325,"id":"CVE-2026-89625","ts":1789270209868,"field":"cvss","old":null,"new":"5.9"},{"seq":147324,"id":"CVE-2026-89625","ts":1789270209868,"field":"severity","old":"none","new":"medium"},{"seq":109078,"id":"CVE-2026-89625","ts":1789183730221,"field":"cvss","old":null,"new":"5.9"},{"seq":109077,"id":"CVE-2026-89625","ts":1789183730221,"field":"severity","old":"none","new":"medium"}]}