CVE-2015-3636: The ping_unhash function in net/ipv4/ping.c in the Linux kernel before 4.0.3 does not initialize a certain...

Security readout for executives and security teams

This is an old Linux kernel flaw that can let a local user crash the system or potentially gain higher privileges. It is not a remote internet-facing bug by itself, but it matters on shared servers, developer hosts, and systems where untrusted users or workloads can run code. Exposure is likely limited to Linux systems running kernels before 4.0.3 or vendor kernels that lack the backported fix. Debian, Ubuntu, SUSE, Fedora, Red Hat, and Oracle advisories are cited, so distro-specific package status matters more than the upstream version string alone. Treat as high priority for legacy Linux estates and shared compute environments. It is less urgent than a remotely exploitable internet-facing flaw, but local privilege escalation in the kernel can turn limited access into full system compromise. Mitigation focus: Apply the relevant Linux kernel security update from the system vendor.; Confirm the running kernel includes the upstream fix or a vendor backport.; Reboot systems after kernel updates so the patched kernel is active..

Prepared

Jun 13, 2026, 22:22 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.