{"id":"CVE-2026-64227","state":"PUBLISHED","title":"ACPI: driver: Check ACPI_COMPANION() against NULL during probe","description":"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.","publishedAt":"2026-07-24T15:23:10.936Z","updatedAt":"2026-07-27T04:37:25.776Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5829046825ac89fffc60f2670bc564fda2c0155a","status":"affected","lessThan":"a9451bf561232314755baf69a5916e0ac77f33fc","versionType":"git"},{"version":"5829046825ac89fffc60f2670bc564fda2c0155a","status":"affected","lessThan":"34f4d0e4e5065237d15651df759a99e81b7f9f51","versionType":"git"},{"version":"5829046825ac89fffc60f2670bc564fda2c0155a","status":"affected","lessThan":"612ddab8fce04394bd7aebe8e0f2599642e30859","versionType":"git"},{"version":"5829046825ac89fffc60f2670bc564fda2c0155a","status":"affected","lessThan":"e4865a56d013e86e46ea6acea15bb6eae01898ff","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/acpi/ac.c","drivers/acpi/acpi_pad.c","drivers/acpi/acpi_tad.c","drivers/acpi/battery.c","drivers/acpi/button.c","drivers/acpi/ec.c","drivers/acpi/hed.c","drivers/acpi/nfit/core.c","drivers/acpi/pfr_telemetry.c","drivers/acpi/pfr_update.c","drivers/acpi/sbs.c","drivers/acpi/sbshc.c","drivers/acpi/thermal.c","drivers/acpi/tiny-power-button.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.7","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.11","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/acpi/ac.c","drivers/acpi/acpi_pad.c","drivers/acpi/acpi_tad.c","drivers/acpi/battery.c","drivers/acpi/button.c","drivers/acpi/ec.c","drivers/acpi/hed.c","drivers/acpi/nfit/core.c","drivers/acpi/pfr_telemetry.c","drivers/acpi/pfr_update.c","drivers/acpi/sbs.c","drivers/acpi/sbshc.c","drivers/acpi/thermal.c","drivers/acpi/tiny-power-button.c"]}],"references":["https://git.kernel.org/stable/c/a9451bf561232314755baf69a5916e0ac77f33fc","https://git.kernel.org/stable/c/34f4d0e4e5065237d15651df759a99e81b7f9f51","https://git.kernel.org/stable/c/612ddab8fce04394bd7aebe8e0f2599642e30859","https://git.kernel.org/stable/c/e4865a56d013e86e46ea6acea15bb6eae01898ff"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64227.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64227","state":"PUBLISHED","datePublished":"2026-07-24T15:23:10.936Z","dateUpdated":"2026-07-27T04:37:25.776Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.771Z"},"containers":{"cna":{"title":"ACPI: driver: Check ACPI_COMPANION() against NULL during probe","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5829046825ac89fffc60f2670bc564fda2c0155a","status":"affected","lessThan":"a9451bf561232314755baf69a5916e0ac77f33fc","versionType":"git"},{"version":"5829046825ac89fffc60f2670bc564fda2c0155a","status":"affected","lessThan":"34f4d0e4e5065237d15651df759a99e81b7f9f51","versionType":"git"},{"version":"5829046825ac89fffc60f2670bc564fda2c0155a","status":"affected","lessThan":"612ddab8fce04394bd7aebe8e0f2599642e30859","versionType":"git"},{"version":"5829046825ac89fffc60f2670bc564fda2c0155a","status":"affected","lessThan":"e4865a56d013e86e46ea6acea15bb6eae01898ff","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/acpi/ac.c","drivers/acpi/acpi_pad.c","drivers/acpi/acpi_tad.c","drivers/acpi/battery.c","drivers/acpi/button.c","drivers/acpi/ec.c","drivers/acpi/hed.c","drivers/acpi/nfit/core.c","drivers/acpi/pfr_telemetry.c","drivers/acpi/pfr_update.c","drivers/acpi/sbs.c","drivers/acpi/sbshc.c","drivers/acpi/thermal.c","drivers/acpi/tiny-power-button.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.7","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.11","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/acpi/ac.c","drivers/acpi/acpi_pad.c","drivers/acpi/acpi_tad.c","drivers/acpi/battery.c","drivers/acpi/button.c","drivers/acpi/ec.c","drivers/acpi/hed.c","drivers/acpi/nfit/core.c","drivers/acpi/pfr_telemetry.c","drivers/acpi/pfr_update.c","drivers/acpi/sbs.c","drivers/acpi/sbshc.c","drivers/acpi/thermal.c","drivers/acpi/tiny-power-button.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/a9451bf561232314755baf69a5916e0ac77f33fc"},{"url":"https://git.kernel.org/stable/c/34f4d0e4e5065237d15651df759a99e81b7f9f51"},{"url":"https://git.kernel.org/stable/c/612ddab8fce04394bd7aebe8e0f2599642e30859"},{"url":"https://git.kernel.org/stable/c/e4865a56d013e86e46ea6acea15bb6eae01898ff"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-07-27T04:37:25.776Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"7.0.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}