A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata, resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the host.
The product attempts to return a memory resource to the system, but it calls the wrong release function or calls the appropriate release function incorrectly.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Qemu | Qemu | * | 6.1.0 (excluding) |
| Qemu | Qemu | 6.1.0-rc1 (including) | 6.1.0-rc1 (including) |
| Advanced Virtualization for RHEL 8.2.1 | RedHat | virt:8.2-8020120210917153657.863bb0db | * |
| Advanced Virtualization for RHEL 8.2.1 | RedHat | virt-devel:8.2-8020120210917153657.863bb0db | * |
| Advanced Virtualization for RHEL 8.4.0.Z | RedHat | virt:av-8040020210922084349.522a0ee4 | * |
| Advanced Virtualization for RHEL 8.4.0.Z | RedHat | virt-devel:av-8040020210922084349.522a0ee4 | * |
| Qemu | Ubuntu | bionic | * |
| Qemu | Ubuntu | devel | * |
| Qemu | Ubuntu | esm-infra/xenial | * |
| Qemu | Ubuntu | focal | * |
| Qemu | Ubuntu | hirsute | * |
| Qemu | Ubuntu | impish | * |
| Qemu | Ubuntu | jammy | * |
| Qemu | Ubuntu | kinetic | * |
| Qemu | Ubuntu | trusty | * |
| Qemu | Ubuntu | trusty/esm | * |
| Qemu | Ubuntu | xenial | * |
This weakness can take several forms, such as: