CVE-2025-39698
Published: September 6, 2025Last modified: September 6, 2025
Description
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.
Status
Product | Release | Package | Status |
---|---|---|---|
Alpaquita Linux | 23 LTS | linux-lts | Not affected (6.1.33-r0) |
25 LTS | linux-lts | Fixed (6.12.44-r0) | |
Stream | linux-lts | Fixed (6.12.44-r0) |