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CVE-2021-3715

nvd nist
Published: Mar 2, 2022Modified: Jun 17, 2026

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7.8
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitability: 1.8 / Impact: 5.9
Source: NVD

Description

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.

Affected (6)

Products: Linux: Linux Kernel
Linux
1 product
Linux Kernel
Configuration A
6 vulnerable
Vulnerable SoftwareAffected Versions
Linux
Linux Kernel
From 3.18 to 4.4.218
Linux Kernel
From 4.10 to 4.14.175
Linux Kernel
From 4.15 to 4.19.114
Linux Kernel
From 4.20 to 5.4.29
Linux Kernel
From 4.5 to 4.9.218
Linux Kernel
From 5.5.0 to 5.5.14

Related CWEs

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (2)

Source: secalert@redhat.com
Mailing ListPatchVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListPatchVendor Advisory

Timeline

No history available yet.