SB2019102132 - Ubuntu update for linux, linux-aws, linux-azure and more

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Main Vulnerability Database SB2019102132

SB2019102132 - Ubuntu update for linux, linux-aws, linux-azure and more

Published: October 21, 2019 Updated: October 31, 2026

Security Bulletin ID SB2019102132
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Buffer overflow (CVE-ID: CVE-2019-18198)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to escalate privileges system.

The vulnerability exists due to a reference count usage error in the fib6_rule_suppress() function in the fib6 suppression feature of net/ipv6/fib6_rules.c within the Linux kernel, when handling the FIB_LOOKUP_NOREF flag. A local user can set the FIB_LOOKUP_NOREF flag, trigge rmemory corruption and execute arbitrary code on the system with elevated privileges.


Remediation

Install update from vendor's website.

References