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CVE-2021-4202

Exploit
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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 3.2 < 4.4.294
Linux ≫ Linux Kernel Version >= 4.5 < 4.9.292
Linux ≫ Linux Kernel Version >= 4.10 < 4.14.257
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.219
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.163
Linux ≫ Linux Kernel Version >= 5.5.0 < 5.10.82
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.5
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.36% 0.274
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7 1 5.9
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd@nist.gov 6.9 3.4 10
AV:L/AC:M/Au:N/C:C/I:C/A:C
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

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
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