EUVD-2026-32483
GHSA-fff5-56xf-g7v8
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2DescriptionNVD
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.
Analysis
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. …
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