CVE-2023-1192: Use-after-free in smb2_is_status_io_timeout()

Vulnerability summary

CVE-2023-1192 is a medium (CVSS 6.5) Use After Free vulnerability in linux linux_kernel. EPSS estimates a 1.10% chance of exploitation in the next 30 days, higher than 65.7% of scored vulnerabilities.

Timeline

1. 01-11-2023
   PublishedVulnerability first disclosed.
2. 27-02-2025
   Last modifiedVulnerability information updated.

Description

A use-after-free flaw was found in smb2_is_status_io_timeout() in CIFS in the Linux Kernel. After CIFS transfers response data to a system call, there are still local variable points to the memory region, and if the system call frees it faster than CIFS uses it, CIFS will access a free memory region, leading to a denial of service.

• CWE-416Use After FreeThe 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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.