7.8

CVE-2021-3715

A flaw was found in the "Routing decision" classifier in the Linux kernel's Traffic Control networking subsystem in the way it handled changing of classification filters, leading to a use-after-free condition. This flaw allows unprivileged local users to escalate their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Data is provided by the National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 3.18 < 4.4.218
Linux ≫ Linux Kernel Version >= 4.5 < 4.9.218
Linux ≫ Linux Kernel Version >= 4.10 < 4.14.175
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.114
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.29
Linux ≫ Linux Kernel Version >= 5.5.0 < 5.5.14
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 0.06% 0.17
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd@nist.gov 7.2 3.9 10
AV:L/AC:L/Au:N/C:C/I:C/A:C
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.