Release Date: | 2025-09-05 | |
Impact: | Moderate | What is this? |
In the Linux kernel, the following vulnerability has been resolved: io_uring/futex: ensure io_futex_wait() cleans up properly on failure The io_futex_data is allocated upfront and assigned to the io_kiocb async_data field, but the request isn't marked with REQ_F_ASYNC_DATA at that point. Those two should always go together, as the flag tells io_uring whether the field is valid or not. Additionally, on failure cleanup, the futex handler frees the data but does not clear ->async_data. Clear the data and the flag in the error path as well. Thanks to Trend Micro Zero Day Initiative and particularly ReDress for reporting this.
See more information about CVE-2025-39698 from MITRE CVE dictionary and NIST NVD
NOTE: The following CVSS metrics and score provided are preliminary and subject to review.
Base Score: | 7.3 |
Vector String: | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H |
Version: | 3.1 |
Attack Vector: | Local |
Attack Complexity: | Low |
Privileges Required: | None |
User Interaction: | None |
Scope: | Unchanged |
Confidentiality Impact: | Low |
Integrity Impact: | Low |
Availability Impact: | High |
Platform | Errata | Release Date |
Oracle Linux version 9 (kernel) | ELSA-2025-16880 | 2025-09-29 |
This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections: