What is CVE-2020-25669?

CVE-2020-25669 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Use After Free flaw (CWE-416). CVE-2020-25669 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2020-25669?

CVE-2020-25669 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2020-25669?

No patch is currently available for CVE-2020-25669. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2020-25669 actively exploited?

CVE-2020-25669 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-2020-25669

High

A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect, there is still an alias in sunkbd_reinit causing Use After Free.

Package Linux Kernel

Published 2021-05-26

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2020-25669 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-2020-25669 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Openwall
http://www.openwall.com/lists/oss-security/2020/11/05/2

Exploit Mailing List Third Party Advisory
Openwall
http://www.openwall.com/lists/oss-security/2020/11/20/5

Exploit Mailing List Third Party Advisory
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
Security
https://security.netapp.com/advisory/ntap-20210702-0006/

Third Party Advisory
Openwall
https://www.openwall.com/lists/oss-security/2020/11/05/2%2C
Openwall
https://www.openwall.com/lists/oss-security/2020/11/20/5%2C
Kernel patch commit
https://github.com/torvalds/linux/commit/77e70d351db7de07a46ac49b87a6c3c7a60fca7e
Patch

Details

CVE ID CVE-2020-25669

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2021-05-26

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2020-25669?

CVE-2020-25669 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . CVE-2020-25669 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2020-25669?

CVE-2020-25669 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2020-25669?

No patch is currently available for CVE-2020-25669. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2020-25669 actively exploited?

No — CVE-2020-25669 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 →