Denial of Service (DoS) Affecting torvalds/linux package, versions [,4.0.3)


Severity

Recommended
0.0
medium
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
2.47% (83rd percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3004990
  • published26 Jan 2022
  • disclosed6 Aug 2015
  • creditUnknown

Introduced: 6 Aug 2015

CVE-2015-3636  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 4.0.3 or higher.

Overview

Affected versions of this package are vulnerable to Denial of Service (DoS). 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.

CVSS Base Scores

version 3.1