{"id":"CVE-2026-64363","state":"PUBLISHED","title":"HID: appleir: fix UAF on pending key_up_timer in remove()","description":"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.","publishedAt":"2026-07-25T08:50:18.824Z","updatedAt":"2026-08-17T04:54:10.084Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e","status":"affected","lessThan":"89ef67359672bf4cd6921524e39f61648fe38c0f","versionType":"git"},{"version":"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e","status":"affected","lessThan":"3d30a0bb0e79621ae921b487835c56198adfafa3","versionType":"git"},{"version":"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e","status":"affected","lessThan":"37a52c61d4f78153c38ae1f7491dfcc8ac828dcf","versionType":"git"},{"version":"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e","status":"affected","lessThan":"05e3decc55d1deca9410e0eb36466651fcbe57a5","versionType":"git"},{"version":"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e","status":"affected","lessThan":"3755f6e25776b8b12ddf062f9b573f05090e4034","versionType":"git"},{"version":"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e","status":"affected","lessThan":"b363d964ca829c1761c9f04188dfa28f90b0f2d4","versionType":"git"},{"version":"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e","status":"affected","lessThan":"6b0838e86da88b1d3bff86f19761ff25af73eaca","versionType":"git"},{"version":"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e","status":"affected","lessThan":"75fe87e19d8aff81eb2c64d15d244ab8da4de945","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-appleir.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.10","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-appleir.c"]}],"references":["https://git.kernel.org/stable/c/89ef67359672bf4cd6921524e39f61648fe38c0f","https://git.kernel.org/stable/c/3d30a0bb0e79621ae921b487835c56198adfafa3","https://git.kernel.org/stable/c/37a52c61d4f78153c38ae1f7491dfcc8ac828dcf","https://git.kernel.org/stable/c/05e3decc55d1deca9410e0eb36466651fcbe57a5","https://git.kernel.org/stable/c/3755f6e25776b8b12ddf062f9b573f05090e4034","https://git.kernel.org/stable/c/b363d964ca829c1761c9f04188dfa28f90b0f2d4","https://git.kernel.org/stable/c/6b0838e86da88b1d3bff86f19761ff25af73eaca","https://git.kernel.org/stable/c/75fe87e19d8aff81eb2c64d15d244ab8da4de945"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64363.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64363","state":"PUBLISHED","datePublished":"2026-07-25T08:50:18.824Z","dateUpdated":"2026-08-17T04:54:10.084Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.783Z"},"containers":{"cna":{"title":"HID: appleir: fix UAF on pending key_up_timer in remove()","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() -> 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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e","status":"affected","lessThan":"89ef67359672bf4cd6921524e39f61648fe38c0f","versionType":"git"},{"version":"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e","status":"affected","lessThan":"3d30a0bb0e79621ae921b487835c56198adfafa3","versionType":"git"},{"version":"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e","status":"affected","lessThan":"37a52c61d4f78153c38ae1f7491dfcc8ac828dcf","versionType":"git"},{"version":"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e","status":"affected","lessThan":"05e3decc55d1deca9410e0eb36466651fcbe57a5","versionType":"git"},{"version":"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e","status":"affected","lessThan":"3755f6e25776b8b12ddf062f9b573f05090e4034","versionType":"git"},{"version":"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e","status":"affected","lessThan":"b363d964ca829c1761c9f04188dfa28f90b0f2d4","versionType":"git"},{"version":"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e","status":"affected","lessThan":"6b0838e86da88b1d3bff86f19761ff25af73eaca","versionType":"git"},{"version":"9a4a5574ce427c364d81746fc7fb82d86b5f1a7e","status":"affected","lessThan":"75fe87e19d8aff81eb2c64d15d244ab8da4de945","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-appleir.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.10","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-appleir.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/89ef67359672bf4cd6921524e39f61648fe38c0f"},{"url":"https://git.kernel.org/stable/c/3d30a0bb0e79621ae921b487835c56198adfafa3"},{"url":"https://git.kernel.org/stable/c/37a52c61d4f78153c38ae1f7491dfcc8ac828dcf"},{"url":"https://git.kernel.org/stable/c/05e3decc55d1deca9410e0eb36466651fcbe57a5"},{"url":"https://git.kernel.org/stable/c/3755f6e25776b8b12ddf062f9b573f05090e4034"},{"url":"https://git.kernel.org/stable/c/b363d964ca829c1761c9f04188dfa28f90b0f2d4"},{"url":"https://git.kernel.org/stable/c/6b0838e86da88b1d3bff86f19761ff25af73eaca"},{"url":"https://git.kernel.org/stable/c/75fe87e19d8aff81eb2c64d15d244ab8da4de945"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:54:10.084Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.18.39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"7.1.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}