What is CVE-2020-25221?

CVE-2020-25221 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10. CVE-2020-25221 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2020-25221?

CVE-2020-25221 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-2020-25221?

No patch is currently available for CVE-2020-25221. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2020-25221 actively exploited?

CVE-2020-25221 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2020-25221

High

get_gate_page in mm/gup.c in the Linux kernel 5.7.x and 5.8.x before 5.8.7 allows privilege escalation because of incorrect reference counting (caused by gate page mishandling) of the struct page that backs the vsyscall page. The result is a refcount underflow. This can be triggered by any 64-bit process that can use ptrace() or process_vm_readv(), aka CID-9fa2dd946743.

Package Linux Kernel

Published 2020-09-10

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-672

CVE-2020-25221 is classified as CWE-672

See CWE-672 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2020-25221 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/2020/09/10/4

Mailing List Third Party Advisory
Kernel.org
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.7

Release Notes Vendor Advisory
Security
https://security.netapp.com/advisory/ntap-20201001-0003/

Third Party Advisory
Kernel patch commit
https://git.kernel.org/linus/8891adc61dce2a8a41fc0c23262b681c3ec4b73a
Patch
Kernel patch commit
https://git.kernel.org/linus/9fa2dd946743ae6f30dc4830da19147bf100a7f2
Patch
Kernel patch commit
https://www.openwall.com/lists/oss-security/2020/09/08/4
Patch

Details

CVE ID CVE-2020-25221

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2020-09-10

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2020-25221?

CVE-2020-25221 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . CVE-2020-25221 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2020-25221?

CVE-2020-25221 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-2020-25221?

No patch is currently available for CVE-2020-25221. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2020-25221 actively exploited?

No — CVE-2020-25221 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.