# CVE-2022-2962: qemu: A DMA reentrancy issue was found in the Tulip device emulation in QEMU

CVE-2022-2962 is fixed in qemu on 1 platform, first by DEBIAN-CVE-2022-2962, released September 13, 2022. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-2962
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0041
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 13, 2022

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | qemu Debian 12.15 (bookworm) | 1:7.1+dfsg-2 | [DEBIAN-CVE-2022-2962](https://patchblox.com/security/data/fix/linux/debian-cve-2022-2962.md) | Sep 13, 2022 |
| Linux | qemu Debian 13.5 (trixie) | 1:7.1+dfsg-2 | [DEBIAN-CVE-2022-2962](https://patchblox.com/security/data/fix/linux/debian-cve-2022-2962.md) | Sep 13, 2022 |
| Linux | qemu Debian 14 | 1:7.1+dfsg-2 | [DEBIAN-CVE-2022-2962](https://patchblox.com/security/data/fix/linux/debian-cve-2022-2962.md) | Sep 13, 2022 |

---

Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.