Unrated severityNVD Advisory· Published Aug 25, 2022· Updated Feb 28, 2025
CVE-2021-3929
CVE-2021-3929
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.
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
6- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XHNN7QJCEQH7AQG5AQP2GEFAQE6K635I/mitrevendor-advisoryx_refsource_FEDORA
- access.redhat.com/security/cve/CVE-2021-3929mitrex_refsource_MISC
- bugzilla.redhat.com/show_bug.cgimitrex_refsource_MISC
- gitlab.com/qemu-project/qemu/-/commit/736b01642d85be832385mitrex_refsource_MISC
- gitlab.com/qemu-project/qemu/-/issues/556mitrex_refsource_MISC
- gitlab.com/qemu-project/qemu/-/issues/782mitrex_refsource_MISC
News mentions
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