CVE-2022-47943: Linux Kernel ksmbd Out-Of-Bounds Read Information Disclosure Vulnerability
An issue was discovered in ksmbd in the Linux kernel 5.15 through 5.19 before 5.19.2. There is an out-of-bounds read and OOPS for SMB2WRITE, when there is a large length in the zero DataOffset case.
Other sources
This vulnerability allows remote attackers to disclose sensitive information on affected installations of Linux Kernel. Authentication is required to exploit this vulnerability. The specific flaw exists within the handling of SMB2WRITE commands. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the kernel.
— ZDI
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2022-47943?
CVE-2022-47943 is considered to be of medium severity due to its potential to allow remote information disclosure.
How do I fix CVE-2022-47943?
To mitigate CVE-2022-47943, update the Linux kernel to version 5.19.2 or later.
Which versions of Linux Kernel are affected by CVE-2022-47943?
CVE-2022-47943 affects Linux Kernel versions 5.15 to 5.19 before 5.19.2.
What type of attack can exploit CVE-2022-47943?
CVE-2022-47943 can be exploited by remote attackers to perform an out-of-bounds read and potentially disclose sensitive information.
Is CVE-2022-47943 a local or remote vulnerability?
CVE-2022-47943 is a remote vulnerability, allowing attackers to exploit the issue from a remote location.