CVE-2025-39697
In the Linux kernel, the following vulnerability has been resolved:
NFS: Fix a race when updating an existing write
After nfs_lock_and_join_requests() tests for whether the request is still attached to the mapping, nothing prevents a call to nfs_inode_remove_request() from succeeding until we actually lock the page group. The reason is that whoever called nfs_inode_remove_request() doesn't necessarily have a lock on the page group head.
So in order to avoid races, let's take the page group lock earlier in nfs_lock_and_join_requests(), and hold it across the removal of the request in nfs_inode_remove_request().
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | 4.14 | 5.10.242 |
| linux / linux_kernel | 5.11 | 5.15.191 |
| linux / linux_kernel | 5.16 | 6.1.150 |
| linux / linux_kernel | 6.2 | 6.6.104 |
| linux / linux_kernel | 6.7 | 6.12.44 |
| linux / linux_kernel | 6.13 | 6.16.4 |
| linux / linux_kernel | 6.17-rc1 | 6.17-rc1.x |
| linux / linux_kernel | 6.17-rc2 | 6.17-rc2.x |
| debian / debian_linux | 11.0 | 11.0.x |
- https://git.kernel.org/stable/c/0ff42a32784e0f2cb46a46da8e9f473538c13e1b
- https://git.kernel.org/stable/c/181feb41f0b268e6288bf9a7b984624d7fe2031d
- https://git.kernel.org/stable/c/202a3432d21ac060629a760fff3b0a39859da3ea
- https://git.kernel.org/stable/c/76d2e3890fb169168c73f2e4f8375c7cc24a765e
- https://git.kernel.org/stable/c/92278ae36935a54e65fef9f8ea8efe7e80481ace
- https://git.kernel.org/stable/c/c32e3c71aaa1c1ba05da88605e2ddd493c58794f
- https://git.kernel.org/stable/c/f230d40147cc37eb3aef4d50e2e2c06ea73d9a77
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
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