CVE-2025-38579
Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix KMSAN uninit-value in extent_info usage KMSAN reported a use of uninitialized value in `__is_extent_mergeable()` and `__is_back_mergeable()` via the read extent tree path. The root cause is that `get_read_extent_info()` only initializes three fields (`fofs`, `blk`, `len`) of `struct extent_info`, leaving the remaining fields uninitialized. This leads to undefined behavior when those fields are accessed later, especially during extent merging. Fix it by zero-initializing the `extent_info` struct before population.
How to fix
- linux linux_kernel5.15.190, 6.1.148, 6.6.102, 6.12.42, 6.15.10, 6.16.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.15 ≤ v < 5.15.190, 5.16 ≤ v < 6.1.148, 6.2 ≤ v < 6.6.102, 6.7 ≤ v < 6.12.42, 6.13 ≤ v < 6.15.10, 6.16 ≤ v < 6.16.1 | 5.15.190, 6.1.148, 6.6.102, 6.12.42, 6.15.10, 6.16.1 |
| debian debian_linux | 11.0 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.