CVE-2021-3929

Katalog CVE

CVSS 8.2 · High EPSS 0,67%

Kerentanan Use After Free pada qemu, fedoraproject fedora. Skor CVSS 3.1 8.2 (High) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

25 Agustus 2022

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

8.2 (High), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-416: Use After Free

EPSS (30 hari)

0,67% peluang dieksploitasi; lebih tinggi dari 50,7% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://bugzilla.redhat.com/show_bug.cgi?id=2020298 issue tracking · patch · advisory pihak ketiga
• https://gitlab.com/qemu-project/qemu/-/commit/736b01642d85be832385 patch · advisory pihak ketiga
• https://gitlab.com/qemu-project/qemu/-/issues/782 exploit · issue tracking · patch · advisory pihak ketiga
• https://access.redhat.com/security/cve/CVE-2021-3929 advisory pihak ketiga
• https://gitlab.com/qemu-project/qemu/-/issues/556 issue tracking · advisory pihak ketiga
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XHNN7QJCEQH7A...
• https://security.netapp.com/advisory/ntap-20250228-0010/