CVE-2026-64363 (GCVE-0-2026-64363)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-07-25 08:50
VLAI
Title
HID: appleir: fix UAF on pending key_up_timer in remove()
Summary
In the Linux kernel, the following vulnerability has been resolved: HID: appleir: fix UAF on pending key_up_timer in remove() appleir_remove() runs hid_hw_stop() before timer_delete_sync(). hid_hw_stop() synchronously unregisters the HID input device via hid_disconnect() -> hidinput_disconnect() -> input_unregister_device(), which drops the last reference and frees the underlying input_dev when no userspace handle holds it open. key_up_tick() reads appleir->input_dev and calls input_report_key() / input_sync() on it. The timer is armed from appleir_raw_event() with a HZ/8 (~125 ms) timeout on every keydown and key-repeat report. If a key was pressed shortly before the device is disconnected, the timer can fire after hid_hw_stop() has freed input_dev but before the teardown drains it. A simple reorder is not sufficient. Putting the timer drain first still leaves a window where a USB URB completion (raw_event) running during hid_hw_stop() can call mod_timer() and re-arm the timer, which then fires after hidinput_disconnect() has freed input_dev. The same URB-completion window also lets raw_event() reach key_up(), key_down() and battery_flat() directly, all of which dereference appleir->input_dev. Introduce a 'removing' flag on struct appleir, gated by the existing spinlock. appleir_remove() sets the flag under the lock and then shuts down the timer with timer_shutdown_sync(), which both drains any in-flight callback and permanently disables further mod_timer() calls. appleir_raw_event() and key_up_tick() bail out early if the flag is set, so no path can arm or run the timer, or dereference appleir->input_dev, after remove() has started tearing down. The keyrepeat and flatbattery branches of appleir_raw_event() previously called into the input layer without holding the spinlock; take it now so the flag check is well-defined. This incidentally closes a pre-existing read-side race on appleir->current_key in the keyrepeat branch. This bug is structurally a sibling of commit 4db2af929279 ("HID: appletb-kbd: fix UAF in inactivity-timer cleanup path") and has been present since the driver was introduced.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9a4a5574ce427c364d81746fc7fb82d86b5f1a7e , < 89ef67359672bf4cd6921524e39f61648fe38c0f (git)
Affected: 9a4a5574ce427c364d81746fc7fb82d86b5f1a7e , < 3d30a0bb0e79621ae921b487835c56198adfafa3 (git)
Affected: 9a4a5574ce427c364d81746fc7fb82d86b5f1a7e , < 37a52c61d4f78153c38ae1f7491dfcc8ac828dcf (git)
Affected: 9a4a5574ce427c364d81746fc7fb82d86b5f1a7e , < 05e3decc55d1deca9410e0eb36466651fcbe57a5 (git)
Affected: 9a4a5574ce427c364d81746fc7fb82d86b5f1a7e , < 3755f6e25776b8b12ddf062f9b573f05090e4034 (git)
Affected: 9a4a5574ce427c364d81746fc7fb82d86b5f1a7e , < b363d964ca829c1761c9f04188dfa28f90b0f2d4 (git)
Affected: 9a4a5574ce427c364d81746fc7fb82d86b5f1a7e , < 6b0838e86da88b1d3bff86f19761ff25af73eaca (git)
Affected: 9a4a5574ce427c364d81746fc7fb82d86b5f1a7e , < 75fe87e19d8aff81eb2c64d15d244ab8da4de945 (git)
Create a notification for this product.
Linux Linux Affected: 3.10
Unaffected: 0 , < 3.10 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.39 , ≤ 6.18.* (semver)
Unaffected: 7.1.4 , ≤ 7.1.* (semver)
Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix)
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{
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: appleir: fix UAF on pending key_up_timer in remove()\n\nappleir_remove() runs hid_hw_stop() before timer_delete_sync().\nhid_hw_stop() synchronously unregisters the HID input device via\nhid_disconnect() -\u003e hidinput_disconnect() -\u003e input_unregister_device(),\nwhich drops the last reference and frees the underlying input_dev when\nno userspace handle holds it open.\n\nkey_up_tick() reads appleir-\u003einput_dev and calls input_report_key() /\ninput_sync() on it.  The timer is armed from appleir_raw_event() with\na HZ/8 (~125 ms) timeout on every keydown and key-repeat report.  If a\nkey was pressed shortly before the device is disconnected, the timer\ncan fire after hid_hw_stop() has freed input_dev but before the\nteardown drains it.\n\nA simple reorder is not sufficient.  Putting the timer drain first\nstill leaves a window where a USB URB completion (raw_event) running\nduring hid_hw_stop() can call mod_timer() and re-arm the timer, which\nthen fires after hidinput_disconnect() has freed input_dev.  The same\nURB-completion window also lets raw_event() reach key_up(), key_down()\nand battery_flat() directly, all of which dereference\nappleir-\u003einput_dev.\n\nIntroduce a \u0027removing\u0027 flag on struct appleir, gated by the existing\nspinlock.  appleir_remove() sets the flag under the lock and then\nshuts down the timer with timer_shutdown_sync(), which both drains any\nin-flight callback and permanently disables further mod_timer() calls.\nappleir_raw_event() and key_up_tick() bail out early if the flag is\nset, so no path can arm or run the timer, or dereference\nappleir-\u003einput_dev, after remove() has started tearing down.\n\nThe keyrepeat and flatbattery branches of appleir_raw_event()\npreviously called into the input layer without holding the spinlock;\ntake it now so the flag check is well-defined.  This incidentally\ncloses a pre-existing read-side race on appleir-\u003ecurrent_key in the\nkeyrepeat branch.\n\nThis bug is structurally a sibling of commit 4db2af929279 (\"HID:\nappletb-kbd: fix UAF in inactivity-timer cleanup path\") and has been\npresent since the driver was introduced."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-25T08:50:18.824Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/89ef67359672bf4cd6921524e39f61648fe38c0f"
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        {
          "url": "https://git.kernel.org/stable/c/3d30a0bb0e79621ae921b487835c56198adfafa3"
        },
        {
          "url": "https://git.kernel.org/stable/c/37a52c61d4f78153c38ae1f7491dfcc8ac828dcf"
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          "url": "https://git.kernel.org/stable/c/05e3decc55d1deca9410e0eb36466651fcbe57a5"
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          "url": "https://git.kernel.org/stable/c/3755f6e25776b8b12ddf062f9b573f05090e4034"
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          "url": "https://git.kernel.org/stable/c/b363d964ca829c1761c9f04188dfa28f90b0f2d4"
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          "url": "https://git.kernel.org/stable/c/6b0838e86da88b1d3bff86f19761ff25af73eaca"
        },
        {
          "url": "https://git.kernel.org/stable/c/75fe87e19d8aff81eb2c64d15d244ab8da4de945"
        }
      ],
      "title": "HID: appleir: fix UAF on pending key_up_timer in remove()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64363",
    "datePublished": "2026-07-25T08:50:18.824Z",
    "dateReserved": "2026-07-19T15:36:31.783Z",
    "dateUpdated": "2026-07-25T08:50:18.824Z",
    "state": "PUBLISHED"
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      "cve": "CVE-2026-64363",
      "date": "2026-07-26",
      "epss": "0.00211",
      "percentile": "0.1145"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-64363\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-25T10:17:18.960\",\"lastModified\":\"2026-07-25T10:17:18.960\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nHID: appleir: fix UAF on pending key_up_timer in remove()\\n\\nappleir_remove() runs hid_hw_stop() before timer_delete_sync().\\nhid_hw_stop() synchronously unregisters the HID input device via\\nhid_disconnect() -\u003e hidinput_disconnect() -\u003e input_unregister_device(),\\nwhich drops the last reference and frees the underlying input_dev when\\nno userspace handle holds it open.\\n\\nkey_up_tick() reads appleir-\u003einput_dev and calls input_report_key() /\\ninput_sync() on it.  The timer is armed from appleir_raw_event() with\\na HZ/8 (~125 ms) timeout on every keydown and key-repeat report.  If a\\nkey was pressed shortly before the device is disconnected, the timer\\ncan fire after hid_hw_stop() has freed input_dev but before the\\nteardown drains it.\\n\\nA simple reorder is not sufficient.  Putting the timer drain first\\nstill leaves a window where a USB URB completion (raw_event) running\\nduring hid_hw_stop() can call mod_timer() and re-arm the timer, which\\nthen fires after hidinput_disconnect() has freed input_dev.  The same\\nURB-completion window also lets raw_event() reach key_up(), key_down()\\nand battery_flat() directly, all of which dereference\\nappleir-\u003einput_dev.\\n\\nIntroduce a \u0027removing\u0027 flag on struct appleir, gated by the existing\\nspinlock.  appleir_remove() sets the flag under the lock and then\\nshuts down the timer with timer_shutdown_sync(), which both drains any\\nin-flight callback and permanently disables further mod_timer() calls.\\nappleir_raw_event() and key_up_tick() bail out early if the flag is\\nset, so no path can arm or run the timer, or dereference\\nappleir-\u003einput_dev, after remove() has started tearing down.\\n\\nThe keyrepeat and flatbattery branches of appleir_raw_event()\\npreviously called into the input layer without holding the spinlock;\\ntake it now so the flag check is well-defined.  This incidentally\\ncloses a pre-existing read-side race on appleir-\u003ecurrent_key in the\\nkeyrepeat branch.\\n\\nThis bug is structurally a sibling of commit 4db2af929279 (\\\"HID:\\nappletb-kbd: fix UAF in inactivity-timer cleanup path\\\") and has been\\npresent since the driver was introduced.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/hid/hid-appleir.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e\",\"lessThan\":\"89ef67359672bf4cd6921524e39f61648fe38c0f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e\",\"lessThan\":\"3d30a0bb0e79621ae921b487835c56198adfafa3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e\",\"lessThan\":\"37a52c61d4f78153c38ae1f7491dfcc8ac828dcf\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e\",\"lessThan\":\"05e3decc55d1deca9410e0eb36466651fcbe57a5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e\",\"lessThan\":\"3755f6e25776b8b12ddf062f9b573f05090e4034\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e\",\"lessThan\":\"b363d964ca829c1761c9f04188dfa28f90b0f2d4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e\",\"lessThan\":\"6b0838e86da88b1d3bff86f19761ff25af73eaca\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e\",\"lessThan\":\"75fe87e19d8aff81eb2c64d15d244ab8da4de945\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/hid/hid-appleir.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.10\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.10\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.39\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.4\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc3\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/05e3decc55d1deca9410e0eb36466651fcbe57a5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3755f6e25776b8b12ddf062f9b573f05090e4034\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/37a52c61d4f78153c38ae1f7491dfcc8ac828dcf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3d30a0bb0e79621ae921b487835c56198adfafa3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6b0838e86da88b1d3bff86f19761ff25af73eaca\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/75fe87e19d8aff81eb2c64d15d244ab8da4de945\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/89ef67359672bf4cd6921524e39f61648fe38c0f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b363d964ca829c1761c9f04188dfa28f90b0f2d4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-07-25T16:00:57Z",
      "cve": "CVE-2026-64363",
      "id": "CVE-2026-64363",
      "initial_release_date": "2026-07-25T16:00:57Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64363",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64363.json",
      "version": "2"
    }
  }
}



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