CVE-2021-4202

Public Exploit

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.

Category

7.0
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.04%
Vendor Advisory kernel.org Vendor Advisory kernel.org Vendor Advisory kernel.org
Affected: n/a kernel
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=2036682 patch third party advisory issue tracking
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3e3b5dfcd16a3e254aab61bd1e8c417dd4503102 patch vendor advisory exploit
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=48b71a9e66c2eab60564b1b1c85f4928ed04e406 patch vendor advisory exploit
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=86cdf8e38792545161dbe3350a7eced558ba4d15 patch vendor advisory exploit
https://security.netapp.com/advisory/ntap-20220513-0002/ third party advisory
http://www.openwall.com/lists/oss-security/2022/06/01/2 third party advisory mailing list
http://www.openwall.com/lists/oss-security/2022/06/04/2 third party advisory mailing list
http://www.openwall.com/lists/oss-security/2022/06/07/2 third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2021-4202?
CVE-2021-4202 has been scored as a high severity vulnerability.
How to fix CVE-2021-4202?
To fix CVE-2021-4202, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-4202 being actively exploited in the wild?
It is possible that CVE-2021-4202 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-4202?
CVE-2021-4202 affects n/a kernel.
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