PT-2024-11490 · Linux+3 · Linux Kernel+3
Published
2021-11-24
·
Updated
2024-08-19
·
CVE-2021-47559
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A NULL pointer dereferencing issue has been identified in the Linux kernel, specifically in the
smc vlan by tcpsk() function. This issue arises when netdev lower get next returns NULL, which is then assigned to ndev. The problem occurs when is vlan dev is called with ndev, potentially leading to a NULL pointer dereference. The issue is resolved by removing the manual implementation and using netdev walk all lower dev() to iterate over lower devices.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
NULL Pointer Dereference
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linux Kernel
Red Os
Suse