CVE-2019-8956

HIGH

Linux Kernel < 4.19.21 - Out-of-Bounds Write

Title source: rule
STIX 2.1

Description

In the Linux Kernel before versions 4.20.8 and 4.19.21 a use-after-free error in the "sctp_sendmsg()" function (net/sctp/socket.c) when handling SCTP_SENDALL flag can be exploited to corrupt memory.

Exploits (1)

nomisec WORKING POC 8 stars
by butterflyhack · poc
https://github.com/butterflyhack/CVE-2019-8956

References (7)

Core 7
Core References
Release Notes, Vendor Advisory x_refsource_misc
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.21
Release Notes, Vendor Advisory x_refsource_misc
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.8
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3930-1/
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3930-2/
Third Party Advisory x_refsource_confirm
https://support.f5.com/csp/article/K12671141

Scores

CVSS v3 7.8
EPSS 0.0102
EPSS Percentile 77.4%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-416 CWE-787
Status published
Products (3)
canonical/ubuntu_linux 18.04
canonical/ubuntu_linux 18.10
linux/linux_kernel 4.17 - 4.19.21
Published Apr 01, 2019
Tracked Since Feb 18, 2026