Out-of-bounds read in Linux kernel - CVE-2018-16885

Vulnerability identifier: #VU16703

CSH Severity: Low

CVSS v4: 6.8 [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]

CVE-ID: CVE-2018-16885

CWE-ID: CWE-125

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local attacker to cause DoS condition on the target system.

The vulnerability exists due to out-of-bounds read. A local attacker can call memcpy_fromiovecend() and similar functions with a zero offset and buffer length, cause a memory access fault and a system halt by accessing invalid memory address.

Linux kernel
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Real Time

kernel (Red Hat package)
kernel-rt (Red Hat package)
Red Hat Virtualization Host

Cybersecurity Help is currently unaware of any official solution to address the vulnerability.

kernel (Red Hat package) - addressed in versions 2.6.32-754.60.1.el6, 3.10.0-1062.el7, 3.10.0-1160.149.1.el7
kernel-rt (Red Hat package) - addressed in versions 3.10.0-1062.rt56.1022.el7, 3.10.0-1160.149.1.rt56.1301.el7

• https://bugzilla.redhat.com/show_bug.cgi?id=1661503

• Denial of service in Linux Kernel
• Red Hat update for kernel-rt
• Red Hat update for kernel
• Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION update for kernel
• Red Hat Enterprise Linux 7 Extended Lifecycle Support update for kernel-rt
• Red Hat Enterprise Linux 7 Extended Lifecycle Support update for kernel