SB2019112174 - Null pointer dereference in Linux kernel
Published: November 21, 2019
Security Bulletin ID
SB2019112174
CSH 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 vulnerability.
1) Null pointer dereference (CVE-ID: CVE-2019-19036)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local non-authenticated attacker to perform a denial of service (DoS) attack.
btrfs_root_node in fs/btrfs/ctree.c in the Linux kernel through 5.3.12 allows a NULL pointer dereference because rcu_dereference(root->node) can be zero.
Remediation
Install update from vendor's website.