SB2022122732 - Denial of service in Linux kernel io_sqpoll_wait_sq
Published: December 27, 2022
Security Bulletin ID
SB2022122732
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) Use-after-free (CVE-ID: CVE-2022-47946)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a use-after-free error within the io_sqpoll_wait_sq() function in fs/io_uring.c. A remote attacker can crash the kernel by forking a process and then quickly terminating it.
Remediation
Install update from vendor's website.