CVE-2020-27825

medium

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.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1905155

https://www.debian.org/security/2021/dsa-4843

https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html

https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html

https://security.netapp.com/advisory/ntap-20210521-0008/

Details

Source: MITRE

Published: 2020-12-11

Updated: 2021-05-21

Type: CWE-362

Risk Information

CVSS v2

Base Score: 5.4

Vector: AV:L/AC:M/Au:N/C:P/I:N/A:C

Impact Score: 7.8

Exploitability Score: 3.4

Severity: MEDIUM

CVSS v3

Base Score: 5.7

Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H

Impact Score: 5.2

Exploitability Score: 0.5

Severity: MEDIUM