What is CVE-2020-25656?

CVE-2020-25656 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.1 out of 10, classified as a Use After Free flaw (CWE-416). CVE-2020-25656 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2020-25656?

CVE-2020-25656 has a CVSS score of 4.1 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N.

Is there a patch available for CVE-2020-25656?

No patch is currently available for CVE-2020-25656. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2020-25656 actively exploited?

CVE-2020-25656 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2020-25656

Medium

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.

Package Linux Kernel

Published 2020-12-02

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

4.1

out of 10

Medium

Attack Vector

Local

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Vector string

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

Weakness type

CWE-416

CVE-2020-25656 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2020-25656 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Debian Security
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html

Mailing List Third Party Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html

Mailing List Third Party Advisory
Lkml
https://lkml.org/lkml/2020/10/16/84

Exploit Mailing List Third Party Advisory
Starwindsoftware
https://www.starwindsoftware.com/security/sw-20210325-0006/

Third Party Advisory
Kernel patch commit
https://bugzilla.redhat.com/show_bug.cgi?id=1888726
Patch
Kernel patch commit
https://lkml.org/lkml/2020/10/29/528
Patch

Details

CVE ID CVE-2020-25656

Severity Medium

CVSS score 4.1 / 10

CVSS version 3.1

Published 2020-12-02

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2020-25656?

CVE-2020-25656 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.1 out of 10 , classified as an Use After Free flaw (CWE-416) . CVE-2020-25656 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2020-25656?

CVE-2020-25656 has a CVSS score of 4.1 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N.
Is there a patch available for CVE-2020-25656?

No patch is currently available for CVE-2020-25656. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2020-25656 actively exploited?

No — CVE-2020-25656 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. View CWE-416 on MITRE CWE →