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7.8
HIGH CVSS 3.1
CVE-2021-47087
tee: optee: Fix incorrect page free bug
Description

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.

INFO

Published Date :

March 4, 2024, 6:15 p.m.

Last Modified :

Jan. 16, 2025, 5:19 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2021-47087 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH [email protected]
Solution
This vulnerability can be remediated by updating the affected Linux packages.
  • Update the affected Linux packages.
  • Reboot the system if required.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-47087.

URL Resource
https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5 Patch
https://git.kernel.org/stable/c/806142c805cacd098e61bdc0f72c778a2389fe4a Patch
https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29 Patch
https://git.kernel.org/stable/c/ad338d825e3f7b96ee542bf313728af2d19fe9ad Patch
https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5 Patch
https://git.kernel.org/stable/c/806142c805cacd098e61bdc0f72c778a2389fe4a Patch
https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29 Patch
https://git.kernel.org/stable/c/ad338d825e3f7b96ee542bf313728af2d19fe9ad Patch
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-47087 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-47087 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-47087 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2021-47087 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Jan. 16, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Added CWE NIST CWE-763
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.4.140 up to (excluding) 5.4.169 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.10.58 up to (excluding) 5.10.89 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.14 up to (excluding) 5.15.12 *cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc6:*:*:*:*:*:*
    Changed Reference Type https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5 No Types Assigned https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5 Patch
    Changed Reference Type https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5 No Types Assigned https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5 Patch
    Changed Reference Type https://git.kernel.org/stable/c/806142c805cacd098e61bdc0f72c778a2389fe4a No Types Assigned https://git.kernel.org/stable/c/806142c805cacd098e61bdc0f72c778a2389fe4a Patch
    Changed Reference Type https://git.kernel.org/stable/c/806142c805cacd098e61bdc0f72c778a2389fe4a No Types Assigned https://git.kernel.org/stable/c/806142c805cacd098e61bdc0f72c778a2389fe4a Patch
    Changed Reference Type https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29 No Types Assigned https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29 Patch
    Changed Reference Type https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29 No Types Assigned https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29 Patch
    Changed Reference Type https://git.kernel.org/stable/c/ad338d825e3f7b96ee542bf313728af2d19fe9ad No Types Assigned https://git.kernel.org/stable/c/ad338d825e3f7b96ee542bf313728af2d19fe9ad Patch
    Changed Reference Type https://git.kernel.org/stable/c/ad338d825e3f7b96ee542bf313728af2d19fe9ad No Types Assigned https://git.kernel.org/stable/c/ad338d825e3f7b96ee542bf313728af2d19fe9ad Patch
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5
    Added Reference https://git.kernel.org/stable/c/806142c805cacd098e61bdc0f72c778a2389fe4a
    Added Reference https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29
    Added Reference https://git.kernel.org/stable/c/ad338d825e3f7b96ee542bf313728af2d19fe9ad
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 28, 2024

    Action Type Old Value New Value
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Mar. 04, 2024

    Action Type Old Value New Value
    Added Description 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.
    Added Reference Linux https://git.kernel.org/stable/c/806142c805cacd098e61bdc0f72c778a2389fe4a [No types assigned]
    Added Reference Linux https://git.kernel.org/stable/c/ad338d825e3f7b96ee542bf313728af2d19fe9ad [No types assigned]
    Added Reference Linux https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29 [No types assigned]
    Added Reference Linux https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5 [No types assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact