CVE-2019-18805

CRITICAL

Linux Kernel < 5.0.11 - Denial of Service via Integer Overflow in tcp_ack_update_rtt

Title source: llm
STIX 2.1

Description

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.

References (6)

Core 6
Core References
Mailing List, Patch, Vendor Advisory x_refsource_misc
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00035.html
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00039.html
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20191205-0001/
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2020:0740

Scores

CVSS v3 9.8
EPSS 0.0057
EPSS Percentile 68.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-190
Status published
Products (19)
broadcom/fabric_operating_system
linux/linux_kernel 5.1 rc1 (7 CPE variants)
linux/linux_kernel 4.4 - 4.4.180
netapp/active_iq_unified_manager
netapp/aff_a400_firmware
netapp/aff_a700s_firmware
netapp/data_availability_services
netapp/e-series_santricity_os_controller 11.0.0 - 11.60.3
netapp/fas8300_firmware
netapp/fas8700_firmware
... and 9 more
Published Nov 07, 2019
Tracked Since Feb 18, 2026