CVE-2018-20784

Advisory lineage Upstream: 0 Downstream: 12
Modified
Published: 22 Feb 2019, 15:00
Last modified:05 Aug 2024, 12:12

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.8 CRITICAL
v3.1 (nvd)
EPSS Score
0.49% LOW
0% probability -0.23%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

22 Feb 2019, 15:00
Published
Vulnerability first disclosed
05 Aug 2024, 12:12
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•CRITICAL•Score: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • v2.0•HIGH•Score: 7.5AV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 0.49%• Percentile: 66%

Techniques & Countermeasures

  • CWE-835•Loop with Unreachable Exit Condition ('Infinite Loop')

    The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

Affected Systems

  • canonical•ubuntu_linux

    14.04 | 16.04 | 18.04

  • linux•linux_kernel

    ≥ 4.13, < 4.14.93 | ≥ 4.19, < 4.19.15 | ≥ 4.20, < 4.20.2 | 5.0:rc1

  • redhat•enterprise_linux

    8.0

  • redhat•enterprise_linux_for_real_time

    8

References (9)