CVE-2021-3750

Katalog CVE

CVSS 8.2 · High EPSS 0,51%

Kerentanan Use After Free pada qemu, redhat enterprise linux. Skor CVSS 3.1 8.2 (High) menurut NVD.

Deskripsi (NVD)

A DMA reentrancy issue was found in the USB EHCI controller emulation of QEMU. EHCI does not verify if the Buffer Pointer overlaps with its MMIO region when it transfers the USB packets. Crafted content may be written to the controller's registers and trigger undesirable actions (such as reset) while the device is still transferring packets. This can ultimately lead 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 execute arbitrary code within the context of the QEMU process on the host. This flaw affects QEMU versions before 7.0.0.

Rincian

Terbit di NVD

2 Mei 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)

0,51% peluang dieksploitasi; lebih tinggi dari 42,1% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://bugzilla.redhat.com/show_bug.cgi?id=1999073 issue tracking · advisory pihak ketiga
• https://gitlab.com/qemu-project/qemu/-/issues/541 exploit · advisory pihak ketiga
• https://gitlab.com/qemu-project/qemu/-/issues/556 advisory pihak ketiga
• https://security.gentoo.org/glsa/202208-27 advisory pihak ketiga
• https://security.netapp.com/advisory/ntap-20220624-0003/ advisory pihak ketiga