CVE-2020-25656

A flaw was found in the Linux kernel. A use-after-free was found in the way the console subsystem was using ioctls KDGKBSENT and KDSKBSENT. A local user could use this flaw to get read memory access out of bounds. The highest threat from this vulnerability is to data confidentiality.

CVSS v3.0 4.1 MEDIUM
CVSS v2.0 1.9 LOW

4.1^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 0.5 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

1.9^/10

CVSS v2.0 : LOW

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

Exploitability : 3.4 / Impact : 2.9

Access Vector LOCAL

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://lkml.org/lkml/2020/10/29/528	Mailing List Patch Third Party Advisory
https://lkml.org/lkml/2020/10/16/84	Exploit Mailing List Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1888726	Exploit Issue Tracking Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html	Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:5.10:-::::::
	cpe:2.3:o:linux:linux_kernel:5.10:rc1::::::

Configuration 2 (hide)

OR	cpe:2.3:o:redhat:enterprise_linux:7.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*

Configuration 3 (hide)

cpe:2.3:a:debian:debian_linux:9.0:*:*:*:*:*:*:*

Information

Published : 2020-12-02 01:15

Updated : 2022-01-01 18:11

NVD link : CVE-2020-25656

Mitre link : CVE-2020-25656

JSON object : View

Products Affected

redhat

enterprise_linux

linux

linux_kernel

debian

debian_linux

CWE

CWE-416

Use After Free

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