CVE-2020-27825

Aliases:UBUNTU-CVE-2020-27825DEBIAN-CVE-2020-27825
Advisory lineage Upstream: 0 Downstream: 24
Modified
Published: 11 Dec 2020, 17:13
Last modified:04 Aug 2024, 16:25

Vulnerability Summary

Overall Risk (default)
low
23/100
CVSS Score
5.7 MEDIUM
v3.1 (nvd)
EPSS Score
0.28% LOW
0% probability +0.14%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

11 Dec 2020, 17:13
Published
Vulnerability first disclosed
04 Aug 2024, 16:25
Last Modified
Vulnerability information updated

Description

A use-after-free flaw was found in kernel/trace/ring_buffer.c in Linux kernel (before 5.10-rc1). There was a race problem in trace_open and resize of cpu buffer running parallely on different cpus, may cause a denial of service problem (DOS). This flaw could even allow a local attacker with special user privilege to a kernel information leak threat.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.7CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H
  • v2.0•MEDIUM•Score: 5.4AV:L/AC:M/Au:N/C:P/I:N/A:C

EPSS Trends

Current EPSS score: 0.28%• Percentile: 21%

Techniques & Countermeasures

  • CWE-362•Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

    The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Affected Systems

  • debian•linux

    < 5.9.6-1 | < 5.9.6-1 | < 5.9.6-1 | < 5.9.6-1

  • ubuntu•linux

    all

  • ubuntu•linux-aws

    all

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-azure

    all | all

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-gcp

    all

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-edge

    all

  • ubuntu•linux-hwe

    all

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-lts-xenial

    all

  • ubuntu•linux-oem

    all

  • ubuntu•linux-oracle-5.0

    all

  • ubuntu•linux-oracle-5.3

    all

  • ubuntu•linux-raspi2

    all

  • debian•debian_linux

    9.0 | 10.0

  • linux•linux_kernel

    5.10:rc1

  • netapp•cloud_backup

    na

  • netapp•h410c_firmware

    na

  • netapp•solidfire_baseboard_management_controller_firmware

    na

  • redhat•enterprise_linux

    7.0 | 8.0

  • redhat•enterprise_mrg

    2.0

References (10)