CVE-2026-46100

Description

In the Linux kernel, the following vulnerability has been resolved: fs: afs: revert mmap_prepare() change Partially reverts commit 9d5403b1036c ("fs: convert most other generic_file_*mmap() users to .mmap_prepare()"). This is because the .mmap invocation establishes a refcount, but .mmap_prepare is called at a point where a merge or an allocation failure might happen after the call, which would leak the refcount increment. Functionality is being added to permit the use of .mmap_prepare in this case, but in the interim, we need to fix this.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

References

• https://git.kernel.org/stable/c/f51f85c044809fbd39ac8ae07ac99bc43ce32bd5 ↗
• https://git.kernel.org/stable/c/48c7a0eaeea41da17d1d84d2d7a4c40be122b246 ↗
• https://git.kernel.org/stable/c/fbfc6578eaca12daa0c09df1e9ba7f2c657b49da ↗