SB2023042428 - Local denial of service in Linux kernel io_uring
Published: April 24, 2023
Security Bulletin ID
SB2023042428
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2023-1583)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error within the io_file_bitmap_get() function in io_uring/filetable.c in the io_uring sub-component. A local user can trigger denial of service conditions via IORING_FILE_INDEX_ALLOC.
Remediation
Install update from vendor's website.