Use After Free Affecting torvalds/linux package, versions [,4.9.36)[4.0,4.11)


Severity

Recommended
0.0
critical
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
37.59% (97th percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3005610
  • published26 Jan 2022
  • disclosed3 Jan 2018
  • creditUnknown

Introduced: 3 Jan 2018

CVE-2017-18017  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 4.9.36, 4.11 or higher.

Overview

Affected versions of this package are vulnerable to Use After Free. The tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c in the Linux kernel before 4.11, and 4.9.x before 4.9.36, allows remote attackers to cause a denial of service (use-after-free and memory corruption) or possibly have unspecified other impact by leveraging the presence of xt_TCPMSS in an iptables action.

CVSS Base Scores

version 3.1