PT-2023-9721 · Linux+3 · Linux Kernel+3
Syzbot
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Published
2023-11-01
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Updated
2025-09-24
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CVE-2023-52843
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
The issue is related to the Linux kernel's LLC (Logical Link Control) component, which reads the mac header with eth hdr without verifying that the skb has an Ethernet header. This can be exploited by inserting packets without mac len and with user configurable skb->protocol, allowing an attacker to potentially cause a denial of service. The vulnerability was discovered by Syzbot on a tun device.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Use of Uninitialized Resource
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linux Kernel
Red Os
Suse