Vulnerability Description
A DMA reentrancy issue was found in the Tulip device emulation in QEMU. When Tulip reads or writes to the rx/tx descriptor or copies the rx/tx frame, it doesn't check whether the destination address is its own MMIO address. This can cause the device to trigger MMIO handlers multiple times, possibly leading to a stack or heap overflow. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Qemu | Qemu | >= 4.2.0, <= 7.1.0 |
Related Weaknesses (CWE)
References
- https://gitlab.com/qemu-project/qemu/-/commit/36a894aeb64a2e02871016da1c37d4a4caPatchThird Party Advisory
- https://gitlab.com/qemu-project/qemu/-/issues/1171ExploitIssue TrackingThird Party Advisory
- https://gitlab.com/qemu-project/qemu/-/commit/36a894aeb64a2e02871016da1c37d4a4caPatchThird Party Advisory
- https://gitlab.com/qemu-project/qemu/-/issues/1171ExploitIssue TrackingThird Party Advisory
FAQ
What is CVE-2022-2962?
CVE-2022-2962 is a vulnerability with a CVSS score of 7.8 (HIGH). A DMA reentrancy issue was found in the Tulip device emulation in QEMU. When Tulip reads or writes to the rx/tx descriptor or copies the rx/tx frame, it doesn't check whether the destination address i...
How severe is CVE-2022-2962?
CVE-2022-2962 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-2962?
Check the references section above for vendor advisories and patch information. Affected products include: Qemu Qemu.