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Rewterz Threat Advisory – CVE-2019-10639 – Linux Kernel “net_hash_mix()” Information Disclosure Vulnerability

Severity

Medium

Analysis Summary

An error related to the “net_hash_mix()” function (include/net/netns/hash.h) can be exploited to disclose certain kernel memory addresses and subsequently bypass KASLR.

Impact

Exposure of sensitive information

Affected Vendors

Linux

Affected Products

  • Linux Kernel 3.16.x
  • Linux Kernel 4.4.x
  • Linux Kernel 4.9.x
  • Linux Kernel 4.14.x
  • Linux Kernel 4.19.x

Remediation

Update to a fixed version Versions

Versions 3.16.x: Update to version 3.16.70.

Versions 4.4.x: Update to version 4.4.179 or later.

Versions 4.9.x: Update to version 4.9.169 or later.

Versions 4.14.x: Update to version 4.14.112 or later.

Versions 4.19.x: Update to version 4.19.35 or later.