Denial of Service (DoS) Affecting torvalds/linux package, versions [,4.5.5)


Severity

Recommended
0.0
high
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
10.2% (96th percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3004403
  • published26 Jan 2022
  • disclosed23 May 2016
  • creditUnknown

Introduced: 23 May 2016

CVE-2016-4557  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 4.5.5 or higher.

Overview

Affected versions of this package are vulnerable to Denial of Service (DoS). The replace_map_fd_with_map_ptr function in kernel/bpf/verifier.c in the Linux kernel before 4.5.5 does not properly maintain an fd data structure, which allows local users to gain privileges or cause a denial of service (use-after-free) via crafted BPF instructions that reference an incorrect file descriptor.

CVSS Base Scores

version 3.1