qemu: A DMA reentrancy issue was found in the NVM Express Controller (NVME) emulation in QEMU
CVE-2021-3929 is fixed in 20 products on 1 platform, first by qemu 1:6.2+dfsg-2ubuntu6.2, released April 29, 2022. It is not reported as exploited. Patch Radar priority: High.
A DMA reentrancy issue was found in the NVM Express Controller (NVME) emulation in QEMU. This CVE is similar to CVE-2021-3750 and, just like it, when the reentrancy write triggers the reset function nvme_ctrl_reset(), data structs will be freed leading 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, executing arbitrary code within the context of the QEMU process on the host.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| qemu · Debian 12.15 (bookworm) | 1:7.0+dfsg-1 | DEBIAN-CVE-2021-3929 | Aug 25, 2022 |
| qemu · Debian 13.5 (trixie) | 1:7.0+dfsg-1 | DEBIAN-CVE-2021-3929 | Aug 25, 2022 |
| qemu · Debian 14 | 1:7.0+dfsg-1 | DEBIAN-CVE-2021-3929 | Aug 25, 2022 |
| qemu · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.2 | qemu 1:6.2+dfsg-2ubuntu6.2 | Apr 29, 2022 |
| qemu-block-extra · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.2 | qemu-block-extra 1:6.2+dfsg-2ubuntu6.2 | Apr 29, 2022 |
| qemu-guest-agent · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.2 | qemu-guest-agent 1:6.2+dfsg-2ubuntu6.2 | Apr 29, 2022 |
| qemu-system · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.2 | qemu-system 1:6.2+dfsg-2ubuntu6.2 | Apr 29, 2022 |
| qemu-system-arm · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.2 | qemu-system-arm 1:6.2+dfsg-2ubuntu6.2 | Apr 29, 2022 |
| qemu-system-common · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.2 | qemu-system-common 1:6.2+dfsg-2ubuntu6.2 | Apr 29, 2022 |
| qemu-system-data · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.2 | qemu-system-data 1:6.2+dfsg-2ubuntu6.2 | Apr 29, 2022 |
| qemu-system-gui · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.2 | qemu-system-gui 1:6.2+dfsg-2ubuntu6.2 | Apr 29, 2022 |
| qemu-system-mips · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.2 | qemu-system-mips 1:6.2+dfsg-2ubuntu6.2 | Apr 29, 2022 |
| qemu-system-misc · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.2 | qemu-system-misc 1:6.2+dfsg-2ubuntu6.2 | Apr 29, 2022 |
| qemu-system-ppc · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.2 | qemu-system-ppc 1:6.2+dfsg-2ubuntu6.2 | Apr 29, 2022 |
| qemu-system-s390x · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.2 | qemu-system-s390x 1:6.2+dfsg-2ubuntu6.2 | Apr 29, 2022 |
| qemu-system-sparc · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.2 | qemu-system-sparc 1:6.2+dfsg-2ubuntu6.2 | Apr 29, 2022 |
| qemu-system-x86 · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.2 | qemu-system-x86 1:6.2+dfsg-2ubuntu6.2 | Apr 29, 2022 |
| qemu-system-x86-microvm · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.2 | qemu-system-x86-microvm 1:6.2+dfsg-2ubuntu6.2 | Apr 29, 2022 |
| qemu-system-x86-xen · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.2 | qemu-system-x86-xen 1:6.2+dfsg-2ubuntu6.2 | Apr 29, 2022 |
| qemu-user · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.2 | qemu-user 1:6.2+dfsg-2ubuntu6.2 | Apr 29, 2022 |
| qemu-user-binfmt · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.2 | qemu-user-binfmt 1:6.2+dfsg-2ubuntu6.2 | Apr 29, 2022 |
| qemu-user-static · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.2 | qemu-user-static 1:6.2+dfsg-2ubuntu6.2 | Apr 29, 2022 |
| qemu-utils · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.2 | qemu-utils 1:6.2+dfsg-2ubuntu6.2 | Apr 29, 2022 |
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