Security restrictions bypass in Linux kernel - CVE-2018-16862
Published: November 24, 2018 / Updated: November 26, 2018
Vulnerability identifier: #VU16060
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2018-16862
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local attacker to bypass security restrictions on the target system.
The vulnerability exists due to an error when the cleancache subsystem clears an inode after the final file truncation (removal). A local attacker can supply new file created with the same inode that may contain leftover pages from cleancache and bypass security restrictions to conduct further attacks.
How to mitigate CVE-2018-16862
Install update from vendor's website.