What is CVE-2021-47087?

CVE-2021-47087 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Release of Invalid Pointer or Reference flaw (CWE-763). CVE-2021-47087 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47087?

CVE-2021-47087 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-2021-47087?

No patch is currently available for CVE-2021-47087. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-47087 actively exploited?

CVE-2021-47087 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Release of Invalid Pointer or Reference (CWE-763)?

The product attempts to return a memory resource to the system but calls the wrong release function. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/763.html

CVE-2021-47087

High

In the Linux kernel, the following vulnerability has been resolved: tee: optee: Fix incorrect page free bug Pointer to the allocated pages (struct page *page) has already progressed towards the end of allocation. It is incorrect to perform __free_pages(page, order) using this pointer as we would free any arbitrary pages. Fix this by stop modifying the page pointer.

Package Linux Kernel

Published 2024-03-04

Last modified 2025-01-16

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-763

CVE-2021-47087 is a Release of Invalid Pointer or Reference vulnerability

What is Release of Invalid Pointer or Reference?

The product attempts to return a memory resource to the system but calls the wrong release function. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2021-47087 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5
Patch
Kernel patch commit
https://git.kernel.org/stable/c/806142c805cacd098e61bdc0f72c778a2389fe4a
Patch
Kernel patch commit
https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2021-47087

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-03-04

Modified 2025-01-16

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-47087?

CVE-2021-47087 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as a Release of Invalid Pointer or Reference flaw (CWE-763) . CVE-2021-47087 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47087?

CVE-2021-47087 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-2021-47087?

No patch is currently available for CVE-2021-47087. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-47087 actively exploited?

No — CVE-2021-47087 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Release of Invalid Pointer or Reference (CWE-763)?

The product attempts to return a memory resource to the system but calls the wrong release function. View CWE-763 on MITRE CWE →