{"cve":"CVE-2021-47494","nvd":{"published":"2024-05-22T09:15:11.270","modified":"2026-08-04T10:17:05.763","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncfg80211: fix management registrations locking\n\nThe management registrations locking was broken, the list was\nlocked for each wdev, but cfg80211_mgmt_registrations_update()\niterated it without holding all the correct spinlocks, causing\nlist corruption.\n\nRather than trying to fix it with fine-grained locking, just\nmove the lock to the wiphy/rdev (still need the list on each\nwdev), we already need to hold the wdev lock to change it, so\nthere's no contention on the lock in any case. This trivially\nfixes the bug since we hold one wdev's lock already, and now\nwill hold the lock that protects all lists.","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-667"],"references":["https://git.kernel.org/stable/c/09b1d5dc6ce1c9151777f6c4e128a59457704c97","https://git.kernel.org/stable/c/3c897f39b71fe68f90599f6a45b5f7bf5618420e","https://git.kernel.org/stable/c/4c22227e39c7a0b4dab55617ee8d34d171fab8d4","https://git.kernel.org/stable/c/09b1d5dc6ce1c9151777f6c4e128a59457704c97","https://git.kernel.org/stable/c/3c897f39b71fe68f90599f6a45b5f7bf5618420e"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2021-47494","score":0.00168,"percentile":0.06176,"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."]}