CVE-2021-3682
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 2.9%
exploitation probability
2.9%top 14% of all CVEs
observed exploitation
nono source reports it
A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata, resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the host.
Affected products
n/a · QEMUReferences
https://bugzilla.redhat.com/show_bug.cgi?id=1989651https://lists.debian.org/debian-lts-announce/2021/09/msg00000.htmlhttps://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlhttps://security.gentoo.org/glsa/202208-27https://security.netapp.com/advisory/ntap-20210902-0006/https://www.debian.org/security/2021/dsa-4980