5.5
MEDIUM
CVE-2021-38203
Btrfs Linux Kernel Deadlock Denial of Service
Description

btrfs in the Linux kernel before 5.13.4 allows attackers to cause a denial of service (deadlock) via processes that trigger allocation of new system chunks during times when there is a shortage of free space in the system space_info.

INFO

Published Date :

Aug. 8, 2021, 8:15 p.m.

Last Modified :

May 3, 2022, 4:04 p.m.

Remotely Exploitable :

No

Impact Score :

3.6

Exploitability Score :

1.8
Affected Products

The following products are affected by CVE-2021-38203 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 Netapp hci_management_node
2 Netapp solidfire
3 Netapp element_software
4 Netapp hci_bootstrap_os
1 Linux linux_kernel
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-2021-38203.

URL Resource
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4 Mailing List Patch Vendor Advisory
https://github.com/torvalds/linux/commit/1cb3db1cf383a3c7dbda1aa0ce748b0958759947 Exploit Patch Third Party Advisory
https://security.netapp.com/advisory/ntap-20210902-0010/ Third Party Advisory

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-2021-38203 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-38203 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.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CWE Remap by [email protected]

    May. 03, 2022

    Action Type Old Value New Value
    Changed CWE CWE-770 CWE-667
  • Modified Analysis by [email protected]

    Oct. 07, 2021

    Action Type Old Value New Value
    Changed Reference Type https://security.netapp.com/advisory/ntap-20210902-0010/ No Types Assigned https://security.netapp.com/advisory/ntap-20210902-0010/ Third Party Advisory
    Added CPE Configuration AND OR *cpe:2.3:o:netapp:hci_bootstrap_os:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:a:netapp:element_software:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:hci_storage_node:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Sep. 02, 2021

    Action Type Old Value New Value
    Added Reference https://security.netapp.com/advisory/ntap-20210902-0010/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Aug. 12, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:N/I:N/A:P)
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4 No Types Assigned https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4 Mailing List, Patch, Vendor Advisory
    Changed Reference Type https://github.com/torvalds/linux/commit/1cb3db1cf383a3c7dbda1aa0ce748b0958759947 No Types Assigned https://github.com/torvalds/linux/commit/1cb3db1cf383a3c7dbda1aa0ce748b0958759947 Exploit, Patch, Third Party Advisory
    Added CWE NIST CWE-770
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 5.13.4
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.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-38203 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-2021-38203 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.06 }} 0.01%

score

0.27377

percentile

CVSS31 - Vulnerability Scoring System
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