CVE-2021-3929 | BDVDB-2026-183045 Detail
QEMU
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.
Impact#
No impact statement in the source data.
Weaknesses#
- CWE-416 Use After Free
References#
- https://gitlab.com/qemu-project/qemu/-/issues/556
- https://bugzilla.redhat.com/show_bug.cgi?id=2020298
- https://access.redhat.com/security/cve/CVE-2021-3929
- https://gitlab.com/qemu-project/qemu/-/issues/782
- https://gitlab.com/qemu-project/qemu/-/commit/736b01642d85be832385
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XHNN7QJCEQH7AQG5AQP2GEFAQE6K635I/
- https://security.netapp.com/advisory/ntap-20250228-0010/
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.