{"api_version":"1","generated_at":"2026-07-25T01:15:36+00:00","cve":"CVE-2026-64227","urls":{"html":"https://cve.report/CVE-2026-64227","api":"https://cve.report/api/cve/CVE-2026-64227.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64227","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64227"},"summary":{"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-24 16:16:51","updated_at":"2026-07-24 16:16:51"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/f1e12d81f9cd250e722da01c7670b518d4181406","name":"https://git.kernel.org/stable/c/f1e12d81f9cd250e722da01c7670b518d4181406","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/34f4d0e4e5065237d15651df759a99e81b7f9f51","name":"https://git.kernel.org/stable/c/34f4d0e4e5065237d15651df759a99e81b7f9f51","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e4865a56d013e86e46ea6acea15bb6eae01898ff","name":"https://git.kernel.org/stable/c/e4865a56d013e86e46ea6acea15bb6eae01898ff","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a9451bf561232314755baf69a5916e0ac77f33fc","name":"https://git.kernel.org/stable/c/a9451bf561232314755baf69a5916e0ac77f33fc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/612ddab8fce04394bd7aebe8e0f2599642e30859","name":"https://git.kernel.org/stable/c/612ddab8fce04394bd7aebe8e0f2599642e30859","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64227","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64227","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 f1e12d81f9cd250e722da01c7670b518d4181406 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 a9451bf561232314755baf69a5916e0ac77f33fc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 34f4d0e4e5065237d15651df759a99e81b7f9f51 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 612ddab8fce04394bd7aebe8e0f2599642e30859 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 e4865a56d013e86e46ea6acea15bb6eae01898ff git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6.145 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12.97 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18.40 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.0.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.11 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","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"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"f1e12d81f9cd250e722da01c7670b518d4181406","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"a9451bf561232314755baf69a5916e0ac77f33fc","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"34f4d0e4e5065237d15651df759a99e81b7f9f51","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"612ddab8fce04394bd7aebe8e0f2599642e30859","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"e4865a56d013e86e46ea6acea15bb6eae01898ff","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"6.6.145","status":"affected","version":"0","versionType":"semver"},{"lessThan":"6.12.97","status":"affected","version":"0","versionType":"semver"},{"lessThan":"6.18.40","status":"affected","version":"0","versionType":"semver"},{"lessThan":"7.0.11","status":"affected","version":"0","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","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"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-07-24T15:23:10.936Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/f1e12d81f9cd250e722da01c7670b518d4181406"},{"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"}],"title":"ACPI: driver: Check ACPI_COMPANION() against NULL during probe","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64227","datePublished":"2026-07-24T15:23:10.936Z","dateReserved":"2026-07-19T15:36:31.771Z","dateUpdated":"2026-07-24T15:23:10.936Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-24 16:16:51","lastModifiedDate":"2026-07-24 16:16:51","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64227","Ordinal":"1","Title":"ACPI: driver: Check ACPI_COMPANION() against NULL during probe","CVE":"CVE-2026-64227","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64227","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"ACPI: driver: Check ACPI_COMPANION() against NULL during probe"}]}}}