SB2016101402 - Denial of service in Linux Kernel
Published: October 14, 2016 Updated: December 8, 2025
Security Bulletin ID
SB2016101402
Severity
Medium
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Uncontrolled recursion (CVE-ID: CVE-2016-8666)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to uncontrollable recursion when parsing IPv4 and GRE headers. A remote attacker can force the kernel to use GRO path for packets with tunnel stacking and perform a denial of service attack.
2) Denial of service (CVE-ID: CVE-2016-8660)
The vulnerability allows a local nonprivileged user to cause DoS conditions on the target system.The weakness exists due to insufficient access control. By using the vfs syscall group in the trinity program, related to a "page lock order bug in the XFS seek hole/data implementation", attackers can trigger fdatasync failure and system hang.
Successful exploitation of the vulnerability results in denial of service on the vulnerable system.
Remediation
Install update from vendor's website.