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7.0
HIGH CVSS 3.1
CVE-2021-4202
Linux NFC Controller Interface (NCI) Use-After-Free Privilege Escalation
Description

A use-after-free flaw was found in nci_request in net/nfc/nci/core.c in NFC Controller Interface (NCI) in the Linux kernel. This flaw could allow a local attacker with user privileges to cause a data race problem while the device is getting removed, leading to a privilege escalation problem.

INFO

Published Date :

March 25, 2022, 7:15 p.m.

Last Modified :

Nov. 21, 2024, 6:37 a.m.

Remotely Exploit :

No

Source :

[email protected]
Affected Products

The following products are affected by CVE-2021-4202 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 2.0 MEDIUM [email protected]
CVSS 3.1 HIGH [email protected]
Solution
A use-after-free flaw requires updating the kernel to mitigate this vulnerability.
  • Update the kernel package to address the vulnerability.
  • Reboot the system to apply the update.
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-2021-4202.

URL Resource
http://www.openwall.com/lists/oss-security/2022/06/01/2 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/06/04/2 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/06/07/2 Mailing List Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2036682 Issue Tracking Patch Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3e3b5dfcd16a3e254aab61bd1e8c417dd4503102 Exploit Patch Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=48b71a9e66c2eab60564b1b1c85f4928ed04e406 Exploit Patch Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=86cdf8e38792545161dbe3350a7eced558ba4d15 Exploit Patch Vendor Advisory
https://security.netapp.com/advisory/ntap-20220513-0002/ Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/06/01/2 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/06/04/2 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/06/07/2 Mailing List Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2036682 Issue Tracking Patch Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3e3b5dfcd16a3e254aab61bd1e8c417dd4503102 Exploit Patch Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=48b71a9e66c2eab60564b1b1c85f4928ed04e406 Exploit Patch Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=86cdf8e38792545161dbe3350a7eced558ba4d15 Exploit Patch Vendor Advisory
https://security.netapp.com/advisory/ntap-20220513-0002/ Third Party Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-4202 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-2021-4202 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-2021-4202 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-2021-4202 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 af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2022/06/01/2
    Added Reference http://www.openwall.com/lists/oss-security/2022/06/04/2
    Added Reference http://www.openwall.com/lists/oss-security/2022/06/07/2
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2036682
    Added Reference https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3e3b5dfcd16a3e254aab61bd1e8c417dd4503102
    Added Reference https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=48b71a9e66c2eab60564b1b1c85f4928ed04e406
    Added Reference https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=86cdf8e38792545161dbe3350a7eced558ba4d15
    Added Reference https://security.netapp.com/advisory/ntap-20220513-0002/
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Removed CWE Red Hat, Inc. CWE-416
  • Reanalysis by [email protected]

    Aug. 04, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 5.16 *cpe:2.3:o:linux:linux_kernel:5.16:-:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:* OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 3.2 up to (excluding) 4.4.294 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.5 up to (excluding) 4.9.292 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10 up to (excluding) 4.14.257 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.219 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.163 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5.0 up to (excluding) 5.10.82 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.5
  • Modified Analysis by [email protected]

    Oct. 06, 2022

    Action Type Old Value New Value
    Removed CVSS V2 NIST (AV:L/AC:M/Au:S/C:C/I:C/A:C)
    Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:C/I:C/A:C)
    Changed Reference Type http://www.openwall.com/lists/oss-security/2022/06/01/2 No Types Assigned http://www.openwall.com/lists/oss-security/2022/06/01/2 Mailing List, Third Party Advisory
    Changed Reference Type http://www.openwall.com/lists/oss-security/2022/06/04/2 No Types Assigned http://www.openwall.com/lists/oss-security/2022/06/04/2 Mailing List, Third Party Advisory
    Changed Reference Type http://www.openwall.com/lists/oss-security/2022/06/07/2 No Types Assigned http://www.openwall.com/lists/oss-security/2022/06/07/2 Mailing List, Third Party Advisory
    Changed Reference Type https://security.netapp.com/advisory/ntap-20220513-0002/ No Types Assigned https://security.netapp.com/advisory/ntap-20220513-0002/ Third Party Advisory
  • CVE Modified by [email protected]

    Jun. 07, 2022

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2022/06/07/2 [No Types Assigned]
  • CVE Modified by [email protected]

    Jun. 05, 2022

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2022/06/04/2 [No Types Assigned]
  • CVE Modified by [email protected]

    Jun. 02, 2022

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2022/06/01/2 [No Types Assigned]
  • CVE Modified by [email protected]

    May. 13, 2022

    Action Type Old Value New Value
    Added Reference https://security.netapp.com/advisory/ntap-20220513-0002/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Apr. 07, 2022

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:L/AC:M/Au:S/C:C/I:C/A:C)
    Added CVSS V3.1 NIST AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2036682 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2036682 Issue Tracking, Patch, Third Party Advisory
    Changed Reference Type https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3e3b5dfcd16a3e254aab61bd1e8c417dd4503102 No Types Assigned https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3e3b5dfcd16a3e254aab61bd1e8c417dd4503102 Exploit, Patch, Vendor Advisory
    Changed Reference Type https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=48b71a9e66c2eab60564b1b1c85f4928ed04e406 No Types Assigned https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=48b71a9e66c2eab60564b1b1c85f4928ed04e406 Exploit, Patch, Vendor Advisory
    Changed Reference Type https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=86cdf8e38792545161dbe3350a7eced558ba4d15 No Types Assigned https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=86cdf8e38792545161dbe3350a7eced558ba4d15 Exploit, Patch, Vendor Advisory
    Added CWE NIST CWE-362
    Added CWE NIST CWE-416
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 5.16 *cpe:2.3:o:linux:linux_kernel:5.16:-:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*
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
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 6.9
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

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

0.03 }} 0.01%

score

0.06971

percentile