{"cve":"CVE-2021-37159","nvd":{"published":"2021-07-21T15:16:20.777","modified":"2026-10-08T22:17:11.047","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","score":6.4},"cwes":["CWE-415","CWE-416"],"references":["https://bugzilla.suse.com/show_bug.cgi?id=1188601","https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a6ecfb39ba9d7316057cea823b196b734f6b18ca","https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dcb713d53e2eadf42b878c12a471e74dc6ed3145","https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html","https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html"],"products":["debian:debian_linux","linux:linux_kernel","oracle:communications_cloud_native_core_binding_support_function","oracle:communications_cloud_native_core_network_exposure_function","oracle:communications_cloud_native_core_policy"],"source":"nvd","synced_at":"2026-10-19T21:21:13.713336758+00:00"},"epss":{"cve":"CVE-2021-37159","score":0.00391,"percentile":0.32994,"date":"2026-10-25"},"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."]}