{"cve":"CVE-2021-47289","nvd":{"published":"2024-05-21T15:15:16.950","modified":"2026-06-17T04:17:06.837","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: fix NULL pointer dereference\n\nCommit 71f642833284 (\"ACPI: utils: Fix reference counting in\nfor_each_acpi_dev_match()\") started doing \"acpi_dev_put()\" on a pointer\nthat was possibly NULL.  That fails miserably, because that helper\ninline function is not set up to handle that case.\n\nJust make acpi_dev_put() silently accept a NULL pointer, rather than\ncalling down to put_device() with an invalid offset off that NULL\npointer.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-476"],"references":["https://git.kernel.org/stable/c/38f54217b423c0101d03a00feec6fb8ec608b12e","https://git.kernel.org/stable/c/cae3fa3d8165761f3000f523b11cfa1cd35206bc","https://git.kernel.org/stable/c/ccf23a0888077a25a0793a746c3941db2a7562e4","https://git.kernel.org/stable/c/fc68f42aa737dc15e7665a4101d4168aadb8e4c4","https://git.kernel.org/stable/c/38f54217b423c0101d03a00feec6fb8ec608b12e"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2021-47289","score":0.00235,"percentile":0.14551,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}