Late Lock Acquisition in ping_unhash Function in Linux Kernel Allows for Denial of Service

CVE-2017-2671 · MEDIUM Severity

AV:L/AC:L/AU:N/C:N/I:N/A:C

The ping_unhash function in net/ipv4/ping.c in the Linux kernel through 4.10.8 is too late in obtaining a certain lock and consequently cannot ensure that disconnect function calls are safe, which allows local users to cause a denial of service (panic) by leveraging access to the protocol value of IPPROTO_ICMP in a socket system call.

Learn more about our Cis Benchmark Audit For Distribution Independent Linux.