{"id":"AZL-6578","summary":"CVE-2021-37159 affecting package kernel for versions less than 5.15.2.1-1","details":"hso_free_net_device in drivers/net/usb/hso.c in the Linux kernel through 5.13.4 calls unregister_netdev without checking for the NETREG_REGISTERED state, leading to a use-after-free and a double free.","modified":"2026-04-01T05:20:38.451535Z","published":"2021-07-21T15:16:20Z","upstream":["CVE-2021-37159"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-37159"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:2","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.2.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-6578.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}