An issue was discovered in net/ipv4/sysctl_net_ipv4.c in the Linux kernel before 5.0.11. There is a net/ipv4/tcp_input.c signed integer overflow in tcp_ack_update_rtt() when userspace writes a very large integer to /proc/sys/net/ipv4/tcp_min_rtt_wlen, leading to a denial of service or possibly unspecified other impact, aka CID-19fad20d15a6.
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00035.html
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00039.html
Source: MITRE
Published: 2019-11-07
Updated: 2021-06-22
Type: CWE-190
Base Score: 7.5
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 10
Severity: HIGH
Base Score: 9.8
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 3.9
Severity: CRITICAL