8.2

CVE-2021-3929

Exploit
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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Qemu ≫ Qemu Version < 7.0.0
Fedoraproject ≫ Fedora Version35
Fedoraproject ≫ Fedora Version36
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.64% 0.459
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 8.2 1.5 6
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://gitlab.com/qemu-project/qemu/-/issues/556
Third Party Advisory
Issue Tracking
https://access.redhat.com/security/cve/CVE-2021-3929
Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2020298
Patch
Third Party Advisory
Issue Tracking
https://gitlab.com/qemu-project/qemu/-/commit/736b01642d85be832385
Patch
Third Party Advisory
https://gitlab.com/qemu-project/qemu/-/issues/782
Patch
Third Party Advisory
Exploit
Issue Tracking
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XHNN7QJCEQH7AQG5AQP2GEFAQE6K635I/
https://security.netapp.com/advisory/ntap-20250228-0010/