CVE-2021-3929

CVSS V2 None CVSS V3 High 8.2
Description
A DMA reentrancy issue was found in the NVM Express Controller (NVME) emulation in QEMU. This CVE is similar to CVE-2021-3750 and, just like it, when the reentrancy write triggers the reset function nvme_ctrl_reset(), data structs will be freed leading to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition or, potentially, executing arbitrary code within the context of the QEMU process on the host.
Overview
  • CVE ID
  • CVE-2021-3929
  • Assigner
  • secalert@redhat.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2022-08-25T20:15:09
  • Last Modified Date
  • 2022-10-01T02:28:36
Weakness Enumerations
CWE URL
CWE-416 http://cwe.mitre.org/data/definitions/416.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* 1 OR 7.0.0
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* 1 OR
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • HIGH
  • User Interaction
  • NONE
  • Scope
  • CHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 8.2
  • Base Severity
  • HIGH
  • Exploitability Score
  • 1.5
  • Impact Score
  • 6
References
Reference URL Reference Tags
https://access.redhat.com/security/cve/CVE-2021-3929 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2020298 Issue Tracking Patch Third Party Advisory
https://gitlab.com/qemu-project/qemu/-/commit/736b01642d85be832385 Patch Third Party Advisory
https://gitlab.com/qemu-project/qemu/-/issues/556 Issue Tracking Third Party Advisory
https://gitlab.com/qemu-project/qemu/-/issues/782 Exploit Issue Tracking Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XHNN7QJCEQH7AQG5AQP2GEFAQE6K635I/ Mailing List Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-3929
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3929
History
Created Old Value New Value Data Type Notes
2022-08-25 21:00:16 Added to TrackCVE