CVE-2016-2070
kernel: potential division by zero in TCP code
Severity
ModerateRed Hat Product Security
CVSS 2.0
Review impact separately from score.
Published · December 21, 2015
Updated · November 21, 2025
Description
A divide-by-zero vulnerability was found in a way the kernel processes TCP connections. The error can occur if a connection starts another cwnd reduction phase by setting tp->prior_cwnd to the current cwnd (0) in tcp_init_cwnd_reduction(). A remote, unauthenticated attacker could use this flaw to crash the kernel (denial of service).
Statement
This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, 7 and MRG-2 as the code with the flaw is not present in the products listed.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 2.0 · 5.4AV:N/AC:H/Au:N/C:N/I:N/A:C
CWE-369 · Divide By Zero