SB2020012735 - Improper Handling of Exceptional Conditions in Linux kernel
Published: January 27, 2020 Updated: July 17, 2020
Security Bulletin ID
SB2020012735
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper Handling of Exceptional Conditions (CVE-ID: CVE-2019-20422)
The vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.
In the Linux kernel before 5.3.4, fib6_rule_lookup in net/ipv6/ip6_fib.c mishandles the RT6_LOOKUP_F_DST_NOREF flag in a reference-count decision, leading to (for example) a crash that was identified by syzkaller, aka CID-7b09c2d052db.
Remediation
Install update from vendor's website.