Resource exhaustion in Qemu
CVE-2022-2962
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (31.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Qemu
- Qemu — versions Will be fixed in QEMU 7.2.0-rc0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- gitlab.com/qemu-project/qemu/-/issues/1171 (Exploit, Third Party Advisory, Issue Tracking)
- gitlab.com/qemu-project/qemu/-/commit/36a894aeb64a2e02871016da1c37d4a4ca109182 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-2962?
- CVE-2022-2962 is a high-severity vulnerability in Qemu, classified under Uncontrolled Resource Consumption. CVSS score: 7.8/10. Published 2022-09-13.
- How severe is CVE-2022-2962?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2022-2962 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.