Rewterz Threat Advisory – CVE-2019-11815 – Linux Kernel “rds_tcp_kill_sock()” Use-After-Free Vulnerability

Severity

Medium

Analysis Summary

A use-after-free error related to the “rds_tcp_kill_sock()” function (net/rds/tcp.c) can be exploited to corrupt memory and subsequently execute arbitrary code.

Impact

Unauthorized System Access

Affected Vendors

Linux

Affected Products

• Linux Kernel 4.4.x
• Linux Kernel 4.9.x
• Linux Kernel 4.14.x
• Linux Kernel 4.19.x
• Linux Kernel 5.0.x

Remediation

Update to a fixed version.

Versions 5.0.x:

Update to version 5.0.8 or later.

Versions 4.19.x:

Update to version 4.19.35 or later.

Versions 4.14.x:

Update to version 4.14.112 or later.

Versions 4.9.x:

Update to version 4.9.169 or later.

Versions 4.4.x:

Update to version 4.4.179 or later.