CVE-2021-3582

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-03-25 · updated 2026-06-17
Weakness: CWE-119

Description

A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device. The issue occurs while handling a "PVRDMA_CMD_CREATE_MR" command due to improper memory remapping (mremap). This flaw allows a malicious guest to crash the QEMU process on the host. The highest threat from this vulnerability is to system availability.

Affected products

Debian Linux: 10.0
QEMU: before 2.17.2 — fixed in 2.17.2

How to fix

Upgrade to a fixed version: QEMU 2.17.2. Check the vendor advisory for mitigations.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1966266
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
https://security.gentoo.org/glsa/202208-27
https://security.netapp.com/advisory/ntap-20220429-0003/
https://bugzilla.redhat.com/show_bug.cgi?id=1966266
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
https://security.gentoo.org/glsa/202208-27
https://security.netapp.com/advisory/ntap-20220429-0003/

Get alerted when CVE-2021-3582 or the next vulnerability affects your stack