{"cve":"CVE-2021-3930","nvd":{"published":"2022-02-18T18:15:09.683","modified":"2026-06-17T04:06:00.523","status":"Modified","description":"An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE SELECT commands in mode_sense_page() if the 'page' argument was set to MODE_PAGE_ALLS (0x3f). A malicious guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","score":6.5},"cwes":["CWE-193"],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=2020588","https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html","https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html","https://security.gentoo.org/glsa/202208-27","https://security.netapp.com/advisory/ntap-20220225-0007/"],"products":["debian:debian_linux","qemu:qemu","redhat:codeready_linux_builder","redhat:codeready_linux_builder_for_ibm_z_systems","redhat:codeready_linux_builder_for_power_little_endian","redhat:enterprise_linux","redhat:enterprise_linux_advanced_virtualization_eus","redhat:enterprise_linux_for_ibm_z_systems","redhat:enterprise_linux_for_power_little_endian","redhat:openstack"],"source":"nvd","synced_at":"2026-10-19T21:28:04.509275555+00:00"},"epss":{"cve":"CVE-2021-3930","score":0.00338,"percentile":0.27291,"date":"2026-11-01"},"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."]}