CVE-2020-15863

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-07-28 · updated 2026-06-17
Weakness: CWE-787

Description

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.

Affected products

Canonical Ubuntu Linux: 16.04, 18.04, 20.04
Debian Linux: 10.0
QEMU: through 5.0.0; 5.1.0-rc0

References

http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00024.html
http://www.openwall.com/lists/oss-security/2020/07/22/1
https://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=5519724a13664b43e225ca05351c60b4468e4555
https://lists.nongnu.org/archive/html/qemu-devel/2020-07/msg03497.html
https://lists.nongnu.org/archive/html/qemu-devel/2020-07/msg05745.html
https://security.gentoo.org/glsa/202208-27
https://usn.ubuntu.com/4467-1/
https://www.debian.org/security/2020/dsa-4760
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00024.html
http://www.openwall.com/lists/oss-security/2020/07/22/1
https://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=5519724a13664b43e225ca05351c60b4468e4555
https://lists.nongnu.org/archive/html/qemu-devel/2020-07/msg03497.html

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