{"cve":"CVE-2021-47024","nvd":{"published":"2024-02-28T09:15:39.243","modified":"2026-06-17T04:16:13.530","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/virtio: free queued packets when closing socket\n\nAs reported by syzbot [1], there is a memory leak while closing the\nsocket. We partially solved this issue with commit ac03046ece2b\n(\"vsock/virtio: free packets during the socket release\"), but we\nforgot to drain the RX queue when the socket is definitely closed by\nthe scheduled work.\n\nTo avoid future issues, let's use the new virtio_transport_remove_sock()\nto drain the RX queue before removing the socket from the af_vsock lists\ncalling vsock_remove_sock().\n\n[1] https://syzkaller.appspot.com/bug?extid=24452624fc4c571eedd9","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-401"],"references":["https://git.kernel.org/stable/c/27691665145e74a45034a9dccf1150cf1894763a","https://git.kernel.org/stable/c/37c38674ef2f8d7e8629e5d433c37d6c1273d16b","https://git.kernel.org/stable/c/8432b8114957235f42e070a16118a7f750de9d39","https://git.kernel.org/stable/c/b605673b523fe33abeafb2136759bcbc9c1e6ebf","https://git.kernel.org/stable/c/27691665145e74a45034a9dccf1150cf1894763a"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:45:59.823092188+00:00"},"epss":{"cve":"CVE-2021-47024","score":0.0025,"percentile":0.16361,"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."]}