#VU14201 Null pointer dereference in Linux kernel - CVE-2018-14612
Published: August 7, 2018
Vulnerability identifier: #VU14201
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2018-14612
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local attacker to cause DoS condition on the target system.
The vulnerability exists in the btrfs_root_node() function due to insufficient validation of chunk block group mappings in the btrfs_read_block_groups() function (as defined in the fs/btrfs/extent-tree.c source code file of the affected software), as well as insufficient empty-tree checks in the check_leaf() function in the fs/btrfs/tree-checker.c source code file. A local attacker can mount a B-Tree File System (Btrfs) image that submits malicious input, trigger an invalid pointer dereference condition in the btrfs_root_node() function and cause the service to crash.
Remediation
Install update from vendor's website.