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CVE-2020-25656

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Date: December 1, 2020

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.

Language: C

Severity Score

Related Resources (11)

https://bugzilla.redhat.com/show_bug.cgi?id=1888726
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-25656
https://nvd.nist.gov/vuln/detail/CVE-2020-25656
https://lkml.org/lkml/2020/10/16/84
https://access.redhat.com/security/cve/CVE-2020-25656
https://security-tracker.debian.org/tracker/CVE-2020-25656
https://www.starwindsoftware.com/security/sw-20210325-0006/
https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
https://lkml.org/lkml/2020/10/29/528
https://www.mend.io/vulnerability-database/CVE-2020-25656

Severity Score

Weakness Type (CWE)

Use After Free

CWE-416

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): HIGH
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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