{"id":"CVE-2026-64603","state":"PUBLISHED","title":"platform/x86: intel-hid: Protect ACPI notify handler against recursion","description":"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->switches check and register the priv->switches\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.","publishedAt":"2026-08-06T07:13:55.114Z","updatedAt":"2026-08-17T04:58:26.397Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e2ffcda1629012a2c1a3706432bc45fdc899a584","status":"affected","lessThan":"a6402808e552e44e9c26a9fe8395ac11703d5800","versionType":"git"},{"version":"e2ffcda1629012a2c1a3706432bc45fdc899a584","status":"affected","lessThan":"86df6499dfd232fbc1c82c0d6eb9322ca67b8cd0","versionType":"git"},{"version":"e2ffcda1629012a2c1a3706432bc45fdc899a584","status":"affected","lessThan":"eace3b3e729d5ba11794d69acfafb58a7950217c","versionType":"git"},{"version":"e2ffcda1629012a2c1a3706432bc45fdc899a584","status":"affected","lessThan":"c085d82613d5618814b84406c8b2d64f1bc305e7","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/platform/x86/intel/hid.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.12.96","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/platform/x86/intel/hid.c"]}],"references":["https://git.kernel.org/stable/c/a6402808e552e44e9c26a9fe8395ac11703d5800","https://git.kernel.org/stable/c/86df6499dfd232fbc1c82c0d6eb9322ca67b8cd0","https://git.kernel.org/stable/c/eace3b3e729d5ba11794d69acfafb58a7950217c","https://git.kernel.org/stable/c/c085d82613d5618814b84406c8b2d64f1bc305e7"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64603.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64603","state":"PUBLISHED","datePublished":"2026-08-06T07:13:55.114Z","dateUpdated":"2026-08-17T04:58:26.397Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.799Z"},"containers":{"cna":{"title":"platform/x86: intel-hid: Protect ACPI notify handler against recursion","descriptions":[{"lang":"en","value":"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->switches check and register the priv->switches\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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e2ffcda1629012a2c1a3706432bc45fdc899a584","status":"affected","lessThan":"a6402808e552e44e9c26a9fe8395ac11703d5800","versionType":"git"},{"version":"e2ffcda1629012a2c1a3706432bc45fdc899a584","status":"affected","lessThan":"86df6499dfd232fbc1c82c0d6eb9322ca67b8cd0","versionType":"git"},{"version":"e2ffcda1629012a2c1a3706432bc45fdc899a584","status":"affected","lessThan":"eace3b3e729d5ba11794d69acfafb58a7950217c","versionType":"git"},{"version":"e2ffcda1629012a2c1a3706432bc45fdc899a584","status":"affected","lessThan":"c085d82613d5618814b84406c8b2d64f1bc305e7","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/platform/x86/intel/hid.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.12.96","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/platform/x86/intel/hid.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/a6402808e552e44e9c26a9fe8395ac11703d5800"},{"url":"https://git.kernel.org/stable/c/86df6499dfd232fbc1c82c0d6eb9322ca67b8cd0"},{"url":"https://git.kernel.org/stable/c/eace3b3e729d5ba11794d69acfafb58a7950217c"},{"url":"https://git.kernel.org/stable/c/c085d82613d5618814b84406c8b2d64f1bc305e7"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:58:26.397Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.12.96"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.18.39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.1.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}