CVE-2021-4202
HIGHCVSS 7/10EPSS 0.36%
Last modified
CVE-2021-4202 is a high-severity vulnerability rated 7/10 on the CVSS scale. 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.. EPSS estimates a 0.36% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.2, < 4.4.294 |
| Linux | Linux Kernel | >= 4.5, < 4.9.292 |
| Linux | Linux Kernel | >= 4.10, < 4.14.257 |
| Linux | Linux Kernel | >= 4.15, < 4.19.219 |
| Linux | Linux Kernel | >= 4.20, < 5.4.163 |
| Linux | Linux Kernel | >= 5.5.0, < 5.10.82 |
| Linux | Linux Kernel | >= 5.11, < 5.15.5 |
References
- http://www.openwall.com/lists/oss-security/2022/06/01/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/06/04/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/06/07/2Mailing List, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2036682Issue Tracking, Patch, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3e3b5dfcd16a3e254aab61bd1e8c417dd4503102Exploit, Patch, Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=48b71a9e66c2eab60564b1b1c85f4928ed04e406Exploit, Patch, Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=86cdf8e38792545161dbe3350a7eced558ba4d15Exploit, Patch, Vendor Advisory
- https://security.netapp.com/advisory/ntap-20220513-0002/Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/06/01/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/06/04/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/06/07/2Mailing List, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2036682Issue Tracking, Patch, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3e3b5dfcd16a3e254aab61bd1e8c417dd4503102Exploit, Patch, Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=48b71a9e66c2eab60564b1b1c85f4928ed04e406Exploit, Patch, Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=86cdf8e38792545161dbe3350a7eced558ba4d15Exploit, Patch, Vendor Advisory
- https://security.netapp.com/advisory/ntap-20220513-0002/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-4202?
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.
How severe is CVE-2021-4202?
CVE-2021-4202 has a CVSS score of 7/10 (HIGH severity). The EPSS model estimates a 0.36% probability of exploitation in the next 30 days.
How do I fix CVE-2021-4202?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-42013It was found that the fix for CVE-2021-41773 in Apache HTTP …9.8
- CVE-2021-42015A vulnerability has been identified in Mendix Applications u…5.5
- CVE-2021-42016A vulnerability has been identified in RUGGEDCOM i800, RUGGE…7.5
- CVE-2021-42017A vulnerability has been identified in RUGGEDCOM i800, RUGGE…5.9
- CVE-2021-42018A vulnerability has been identified in RUGGEDCOM i800, RUGGE…5.9
- CVE-2021-42019A vulnerability has been identified in RUGGEDCOM i800, RUGGE…5.9
- CVE-2021-42020A vulnerability has been identified in RUGGEDCOM i800, RUGGE…7.5
- CVE-2021-42021A vulnerability has been identified in Siveillance Video DLN…7.5
- CVE-2021-42022A vulnerability has been identified in SIMATIC eaSie PCS 7 S…6.5
- CVE-2021-42023A vulnerability has been identified in ModelSim Simulation (…6.5
- CVE-2021-42024A vulnerability has been identified in Simcenter STAR-CCM+ V…7.8
- CVE-2021-42025A vulnerability has been identified in Mendix Applications u…6.5
Are you affected by CVE-2021-4202?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST