{"id":"CVE-2026-64603","summary":"platform/x86: intel-hid: Protect ACPI notify handler against recursion","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: intel-hid: Protect ACPI notify handler against recursion\n\nSince commit e2ffcda16290 (\"ACPI: OSL: Allow Notify () handlers to run on\nall CPUs\") ACPI notify handlers like the intel-hid notify_handler() may\nrun on multiple CPU cores racing with themselves.\n\nOn convertibles and detachables (matched by DMI chassis-type 31 and 32 in\ndmi_auto_add_switch[]) the SW_TABLET_MODE input device is registered\nlazily from notify_handler() on the first tablet-mode event, via\nintel_hid_switches_setup(). When two such events race on different CPUs\nboth can pass the !priv-\u003eswitches check and register the priv-\u003eswitches\ninput device twice, resulting in a duplicate sysfs entry and a subsequent\nNULL pointer dereference.\n\nThis is the same class of bug fixed by commit e075c3b13a0a (\"platform/x86:\nintel-vbtn: Protect ACPI notify handler against recursion\") for the\nsibling intel-vbtn driver.\n\nProtect intel-hid notify_handler() from racing with itself with a mutex\nto fix this.","modified":"2026-08-08T03:48:19.018079161Z","published":"2026-08-06T07:13:55.114Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64603.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/86df6499dfd232fbc1c82c0d6eb9322ca67b8cd0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a6402808e552e44e9c26a9fe8395ac11703d5800"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c085d82613d5618814b84406c8b2d64f1bc305e7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eace3b3e729d5ba11794d69acfafb58a7950217c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64603.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64603"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"e2ffcda1629012a2c1a3706432bc45fdc899a584"},{"fixed":"a6402808e552e44e9c26a9fe8395ac11703d5800"},{"fixed":"86df6499dfd232fbc1c82c0d6eb9322ca67b8cd0"},{"fixed":"eace3b3e729d5ba11794d69acfafb58a7950217c"},{"fixed":"c085d82613d5618814b84406c8b2d64f1bc305e7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64603.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.8.0"},{"fixed":"6.12.96"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.39"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64603.json"}}],"schema_version":"1.8.0"}