CVE & CISA-KEV Catalog

CVE-2015-3636

MEDIUMEPSS 83th pctl
4.9
CVSS v2
NVD

Description

The ping_unhash function in net/ipv4/ping.c in the Linux kernel before 4.0.3 does not initialize a certain list data structure during an unhash operation, which allows local users to gain privileges or cause a denial of service (use-after-free and system crash) by leveraging the ability to make a SOCK_DGRAM socket system call for the IPPROTO_ICMP or IPPROTO_ICMPV6 protocol, and then making a connect system call after a disconnect.

How to fix

Remediation Available
linuxDebian
Fixed in:4.0.2-1CVE-2015-3636
Fixed in:4.0.2-1CVE-2015-3636
Fixed in:4.0.2-1CVE-2015-3636
Fixed in:4.0.2-1CVE-2015-3636
linuxUbuntu
Fixed in:3.13.0-54.91USN-2634-1
linux-image-3.13.0-54-genericUbuntu
Fixed in:3.13.0-54.91USN-2634-1
linux-image-3.13.0-54-generic-lpaeUbuntu
Fixed in:3.13.0-54.91USN-2634-1
linux-image-3.13.0-54-lowlatencyUbuntu
Fixed in:3.13.0-54.91USN-2634-1
linux-image-3.13.0-54-powerpc-e500Ubuntu
Fixed in:3.13.0-54.91USN-2634-1
linux-image-3.13.0-54-powerpc-e500mcUbuntu
Fixed in:3.13.0-54.91USN-2634-1
linux-image-3.13.0-54-powerpc-smpUbuntu
Fixed in:3.13.0-54.91USN-2634-1
linux-image-3.13.0-54-powerpc64-embUbuntu
Fixed in:3.13.0-54.91USN-2634-1
linux-image-3.13.0-54-powerpc64-smpUbuntu
Fixed in:3.13.0-54.91USN-2634-1
linux-image-3.16.0-39-genericUbuntu
Fixed in:3.16.0-39.53~14.04.1USN-2635-1
linux-image-3.16.0-39-generic-lpaeUbuntu
Fixed in:3.16.0-39.53~14.04.1USN-2635-1
linux-image-3.16.0-39-lowlatencyUbuntu
Fixed in:3.16.0-39.53~14.04.1USN-2635-1
linux-image-3.16.0-39-powerpc-e500mcUbuntu
Fixed in:3.16.0-39.53~14.04.1USN-2635-1
linux-image-3.16.0-39-powerpc-smpUbuntu
Fixed in:3.16.0-39.53~14.04.1USN-2635-1
linux-image-3.16.0-39-powerpc64-embUbuntu
Fixed in:3.16.0-39.53~14.04.1USN-2635-1
linux-image-3.16.0-39-powerpc64-smpUbuntu
Fixed in:3.16.0-39.53~14.04.1USN-2635-1
linux-image-3.19.0-20-genericUbuntu
Fixed in:3.19.0-20.20~14.04.1USN-2636-1
linux-image-3.19.0-20-generic-lpaeUbuntu
Fixed in:3.19.0-20.20~14.04.1USN-2636-1
linux-image-3.19.0-20-lowlatencyUbuntu
Fixed in:3.19.0-20.20~14.04.1USN-2636-1
linux-image-3.19.0-20-powerpc-e500mcUbuntu
Fixed in:3.19.0-20.20~14.04.1USN-2636-1
linux-image-3.19.0-20-powerpc-smpUbuntu
Fixed in:3.19.0-20.20~14.04.1USN-2636-1
linux-image-3.19.0-20-powerpc64-embUbuntu
Fixed in:3.19.0-20.20~14.04.1USN-2636-1
linux-image-3.19.0-20-powerpc64-smpUbuntu
Fixed in:3.19.0-20.20~14.04.1USN-2636-1
linux-lts-utopicUbuntu
Fixed in:3.16.0-39.53~14.04.1USN-2635-1
linux-lts-vividUbuntu
Fixed in:3.19.0-20.20~14.04.1USN-2636-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

2.47%probability of exploitation in 30 days
83rdpercentile

Elevated risk: more likely to be exploited than 83% of all known CVEs.

References

Embed a live status badge for CVE-2015-3636
CVE-2015-3636 severity badge

Markdown

[![CVE-2015-3636](https://tridentstack.com/cve/badge/CVE-2015-3636.svg)](https://tridentstack.com/cve/CVE-2015-3636)

HTML

<a href="https://tridentstack.com/cve/CVE-2015-3636"><img src="https://tridentstack.com/cve/badge/CVE-2015-3636.svg" alt="CVE-2015-3636"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.