DEBIAN-CVE-2025-39698
Record from OSV · Published September 5, 2025
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.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| linux | Debian:14 | 6.16.5-1 |
| linux | Debian:13 | 6.12.48-1 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Debian:14 | linux | 0, 6.12.100-1, 6.12.101-1 |
| Debian:13 | linux | 0, 6.12.38-1, 6.12.41-1 |
Timeline
- Sep 5, 2025 CVE Published
- Oct 23, 2026 CVE Updated
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