SB20251028127 - Integer underflow in Linux kernel io_uring
Published: October 28, 2025
Security Bulletin ID
SB20251028127
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Integer underflow (CVE-ID: CVE-2025-40046)
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to integer underflow within the io_zcrx_recv_skb() function in io_uring/zcrx.c. A local user can execute arbitrary code.
Remediation
Install update from vendor's website.