{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"CRITICAL" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"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() -> hidinput_disconnect() -> 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->input_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->input_dev.\n\nIntroduce a 'removing' 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->input_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->current_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.", "category":"general", "title":"Synopsis" } ], "publisher":null, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64363" }, { "summary":"CVE-2026-64363 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2026/csaf-openeuler-cve-2026-64363.json" }, { "summary":"openEuler-SA-2026-4591", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4591" }, { "summary":"CVE-2026-64363", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-64363&packageName=kernel" } ], "title":"openEuler cve CVE-2026-64363", "tracking":{ "initial_release_date":"2026-10-30T11:21:29+08:00", "revision_history":[ { "date":"2026-10-30T11:21:29+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-10-30T11:21:29+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2026-10-30T11:21:29+08:00", "id":"CVE-2026-64363", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP4" }, "product_id":"openEuler-22.03-LTS-SP4", "name":"openEuler-22.03-LTS-SP4" }, "name":"openEuler-22.03-LTS-SP4", "category":"product_version" } ], "category":"product_name" }, { "name":"src", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP4" }, "product_id":"kernel-5.10.0-339.0.0.240.oe2203sp4.src.rpm", 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"category":"default_component_of" } ] }, "vulnerabilities":[ { "cve":"CVE-2026-64363", "notes":[ { "text":"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() -> hidinput_disconnect() -> 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->input_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->input_dev.\n\nIntroduce a 'removing' 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->input_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->current_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.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-22.03-LTS-SP4:kernel-5.10.0-339.0.0.240.oe2203sp4.src", "openEuler-22.03-LTS-SP4:bpftool-5.10.0-339.0.0.240.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:bpftool-debuginfo-5.10.0-339.0.0.240.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-5.10.0-339.0.0.240.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-debuginfo-5.10.0-339.0.0.240.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-debugsource-5.10.0-339.0.0.240.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-devel-5.10.0-339.0.0.240.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-headers-5.10.0-339.0.0.240.oe2203sp4.aarch64", 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