{"cve":"CVE-2021-3392","nvd":{"published":"2021-03-23T20:15:13.440","modified":"2026-06-17T04:05:00.957","status":"Modified","description":"A use-after-free flaw was found in the MegaRAID emulator of QEMU. This issue occurs while processing SCSI I/O requests in the case of an error mptsas_free_request() that does not dequeue the request object 'req' from a pending requests queue. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. Versions between 2.10.0 and 5.2.0 are potentially affected.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L","score":3.2},"cwes":["CWE-416"],"references":["https://bugs.launchpad.net/qemu/+bug/1914236","https://bugzilla.redhat.com/show_bug.cgi?id=1924042","https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html","https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html","https://security.netapp.com/advisory/ntap-20210507-0001/"],"products":["debian:debian_linux","fedoraproject:fedora","qemu:qemu"],"source":"nvd","synced_at":"2026-10-19T21:15:50.279857260+00:00"},"epss":{"cve":"CVE-2021-3392","score":0.0045,"percentile":0.3909,"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."]}