CVE-2018-20784

CRITICAL EPSS 89.6%
Published Feb 22, 20197y ago · Modified Jun 17, 20262w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Feb 22, 2019 7y ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel before 4.20.2, kernel/sched/fair.c mishandles leaf cfs_rq's, which allows attackers to cause a denial of service (infinite loop in update_blocked_averages) or possibly have unspecified other impact by inducing a high load.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
89.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-835

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel*≥4.13  –  <4.14.93
linuxlinux_kernel*≥4.19  –  <4.19.15
linuxlinux_kernel*≥4.20  –  <4.20.2
linuxlinux_kernel5.0any
canonicalubuntu_linux14.04any
canonicalubuntu_linux16.04any
canonicalubuntu_linux18.04any
redhatenterprise_linux8.0any
redhatenterprise_linux_for_real_time8any

References 9

  • git.kernel.org http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c40f7d74c741a907cfaeb73a7697081881c497d0
    PatchVendor Advisory
  • access.redhat.com https://access.redhat.com/errata/RHSA-2019:1959
    Third Party Advisory
  • access.redhat.com https://access.redhat.com/errata/RHSA-2019:1971
    Third Party Advisory
  • cdn.kernel.org https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.2
    Release NotesVendor Advisory
  • github.com https://github.com/torvalds/linux/commit/c40f7d74c741a907cfaeb73a7697081881c497d0
    PatchThird Party Advisory
  • usn.ubuntu.com https://usn.ubuntu.com/4115-1/
    Third Party Advisory
  • usn.ubuntu.com https://usn.ubuntu.com/4118-1/
    Third Party Advisory
  • usn.ubuntu.com https://usn.ubuntu.com/4211-1/
    Third Party Advisory
  • usn.ubuntu.com https://usn.ubuntu.com/4211-2/
    Third Party Advisory

Remediation

  • git.kernel.org http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c40f7d74c741a907cfaeb73a7697081881c497d0
    PatchVendor Advisory
  • github.com https://github.com/torvalds/linux/commit/c40f7d74c741a907cfaeb73a7697081881c497d0
    PatchThird Party Advisory