CVEvulnerability
CVE-2021-3750
8.2 HIGH
Official page ↗
- Status
- Modified
- Published
- 2022-05-02
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 8.2 HIGH — CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 4.6 MEDIUM — AV:L/AC:L/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-416
Description
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.
Affected configurations
• qemu qemu (< 7.0.0)
• redhat enterprise linux 8.0
Related
Weakness · CWE (1)
- CWE-416 Use After Free weakness
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1999073 Issue Tracking, Third Party Advisory
- https://gitlab.com/qemu-project/qemu/-/issues/541 Exploit, Third Party Advisory
- https://gitlab.com/qemu-project/qemu/-/issues/556 Third Party Advisory
- https://security.gentoo.org/glsa/202208-27 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220624-0003/ Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1999073 Issue Tracking, Third Party Advisory
- https://gitlab.com/qemu-project/qemu/-/issues/541 Exploit, Third Party Advisory
- https://gitlab.com/qemu-project/qemu/-/issues/556 Third Party Advisory
- https://security.gentoo.org/glsa/202208-27 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220624-0003/ Third Party Advisory