{"id":"CVE-2026-64227","summary":"ACPI: driver: Check ACPI_COMPANION() against NULL during probe","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: driver: Check ACPI_COMPANION() against NULL during probe\n\nSince every platform driver can be forced to match a device that doesn't\nmatch its list of device IDs because of device_match_driver_override(),\nplatform drivers that rely on the existence of a device's ACPI companion\nobject should verify its presence.\n\nAccordingly, add requisite ACPI_COMPANION() or ACPI_HANDLE() checks\nagainst NULL to 13 platform drivers handling core ACPI devices.\n\nAlso change the value returned by the ACPI thermal zone driver when\nthe device's ACPI companion is not present to -ENODEV for consistency\nwith the other drivers.","modified":"2026-07-28T03:46:49.060078868Z","published":"2026-07-24T15:23:10.936Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64227.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/34f4d0e4e5065237d15651df759a99e81b7f9f51"},{"type":"WEB","url":"https://git.kernel.org/stable/c/612ddab8fce04394bd7aebe8e0f2599642e30859"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a9451bf561232314755baf69a5916e0ac77f33fc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e4865a56d013e86e46ea6acea15bb6eae01898ff"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64227.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64227"},{"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":"5829046825ac89fffc60f2670bc564fda2c0155a"},{"fixed":"a9451bf561232314755baf69a5916e0ac77f33fc"},{"fixed":"34f4d0e4e5065237d15651df759a99e81b7f9f51"},{"fixed":"612ddab8fce04394bd7aebe8e0f2599642e30859"},{"fixed":"e4865a56d013e86e46ea6acea15bb6eae01898ff"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64227.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.11"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64227.json"}}],"schema_version":"1.7.5"}