Idaifish

**Name of the Vulnerable Software and Affected Versions** Linux kernel versions prior to 4.12 **Description** The issue allows local users to cause a denial of service, resulting in a system crash due to a divide-by-zero error in the ` tcp select window` function. This occurs when a disconnect is triggered within a certain `tcp recvmsg` code path. **Recommendations** For Linux kernel versions prior to 4.12, update to version 4.12 or later to resolve the issue.

**Name of the Vulnerable Software and Affected Versions** Linux kernel versions 4.13-rc1 through 4.13-rc6 **Description** The issue is related to a NULL pointer dereference in the Linux kernel, specifically in the net/ipv4/route.c file. This allows local users to cause a denial of service or possibly have other unspecified impacts via crafted system calls. The problem is associated with errors in pointer handling. **Recommendations** For Linux kernel versions 4.13-rc1 through 4.13-rc6, consider applying a patch that fixes the NULL pointer dereference issue in the net/ipv4/route.c file to prevent local users from causing a denial of service or other potential impacts. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

**Name of the Vulnerable Software and Affected Versions** Linux kernel versions prior to 4.11.3 **Description** The issue is related to the ` ip6 append data` function in the Linux kernel, which is too late in checking whether an overwrite of an skb data structure may occur. This allows local users to cause a denial of service (system crash) via crafted system calls. **Recommendations** For Linux kernel versions prior to 4.11.3, update to version 4.11.3 or later to resolve the issue.