Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.2, < 4.4.294 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2022/06/01/2Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2022/06/04/2Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2022/06/07/2Mailing ListThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2036682Issue TrackingPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3e3bExploitPatchVendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=48b7ExploitPatchVendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=86cdExploitPatchVendor Advisory
- https://security.netapp.com/advisory/ntap-20220513-0002/Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/06/01/2Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2022/06/04/2Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2022/06/07/2Mailing ListThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2036682Issue TrackingPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3e3bExploitPatchVendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=48b7ExploitPatchVendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=86cdExploitPatchVendor Advisory
FAQ
What is CVE-2021-4202?
CVE-2021-4202 is a vulnerability with a CVSS score of 7.0 (HIGH). 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 ...
How severe is CVE-2021-4202?
CVE-2021-4202 has been rated HIGH with a CVSS base score of 7.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-4202?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.