CVE-2026-64363
HID: appleir: fix UAF on pending key_up_timer in remove()
Description
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.
INFO
Published Date :
July 25, 2026, 10:17 a.m.
Last Modified :
Aug. 17, 2026, 5:17 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Synchronize timer shutdown before device unregistration.
- Introduce a 'removing' flag protected by a spinlock.
- Add early bailouts in event handlers if the flag is set.
- Acquire spinlock before accessing shared data and flag.
References to Advisories, Solutions, and Tools
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CVE-2026-64363.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64363 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64363
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2026-64363 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64363 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', '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'}], 'programFiles': ['drivers/hid/hid-appleir.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.10'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.10', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/hid/hid-appleir.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', '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'}], 'programFiles': ['drivers/hid/hid-appleir.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.10'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.10', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/hid/hid-appleir.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 25, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', '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'}], 'programFiles': ['drivers/hid/hid-appleir.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.10'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.10', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/hid/hid-appleir.c'], 'defaultStatus': 'affected'}] Added Description 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. Added Reference https://git.kernel.org/stable/c/05e3decc55d1deca9410e0eb36466651fcbe57a5 Added Reference https://git.kernel.org/stable/c/3755f6e25776b8b12ddf062f9b573f05090e4034 Added Reference https://git.kernel.org/stable/c/37a52c61d4f78153c38ae1f7491dfcc8ac828dcf Added Reference https://git.kernel.org/stable/c/3d30a0bb0e79621ae921b487835c56198adfafa3 Added Reference https://git.kernel.org/stable/c/6b0838e86da88b1d3bff86f19761ff25af73eaca Added Reference https://git.kernel.org/stable/c/75fe87e19d8aff81eb2c64d15d244ab8da4de945 Added Reference https://git.kernel.org/stable/c/89ef67359672bf4cd6921524e39f61648fe38c0f Added Reference https://git.kernel.org/stable/c/b363d964ca829c1761c9f04188dfa28f90b0f2d4