Qemu emulator <= 3.0.0 built with the NE2000 NIC emulation support is vulnerable to an integer overflow, which could lead to buffer overflow issue. It could occur when receiving packets over the network. A user inside guest could use this flaw to crash the Qemu process resulting in DoS.
https://www.openwall.com/lists/oss-security/2018/10/08/1
https://lists.gnu.org/archive/html/qemu-devel/2018-09/msg03273.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10839
https://www.debian.org/security/2018/dsa-4338
https://usn.ubuntu.com/3826-1/
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
Source: MITRE
Published: 2018-10-16
Updated: 2023-02-13
Type: CWE-121
Base Score: 4
Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P
Impact Score: 2.9
Exploitability Score: 8
Severity: MEDIUM
Base Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 2.8
Severity: MEDIUM