hw/net/xgmac.c in the XGMAC Ethernet controller in QEMU before 07-20-2020 has a buffer overflow. This occurs during packet transmission and affects the highbank and midway emulated machines. A guest user or process could use this flaw to crash the QEMU process on the host, resulting in a denial of service or potential privileged code execution. This was fixed in commit 5519724a13664b43e225ca05351c60b4468e4555.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15863
Reference (s):
- http://www.openwall.com/lists/oss-security/2020/07/22/1
- https://git.qemu.org/?p=qemu.git;a=commitdiff;h=5519724a13664b43e225ca05351c60b4468e4555
- DEBIAN:DSA-4760
- URL: https://www.debian.org/security/2020/dsa-4760
- https://lists.nongnu.org/archive/html/qemu-devel/2020-07/msg03497.html