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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.

PUBLISHED Reserved 2026-05-13 | Published 2026-05-27 | Updated 2026-05-30 | Assigner Linux




HIGH: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Product status

Default status
unaffected

9d5403b1036cdcd4be0f9f5568612c0e60e73d79 (git) before f51f85c044809fbd39ac8ae07ac99bc43ce32bd5
affected

9d5403b1036cdcd4be0f9f5568612c0e60e73d79 (git) before 48c7a0eaeea41da17d1d84d2d7a4c40be122b246
affected

9d5403b1036cdcd4be0f9f5568612c0e60e73d79 (git) before fbfc6578eaca12daa0c09df1e9ba7f2c657b49da
affected

Default status
affected

6.17
affected

Any version before 6.17
unaffected

6.18.27 (semver)
unaffected

7.0.4 (semver)
unaffected

7.1-rc1 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/f51f85c044809fbd39ac8ae07ac99bc43ce32bd5

git.kernel.org/...c/48c7a0eaeea41da17d1d84d2d7a4c40be122b246

git.kernel.org/...c/fbfc6578eaca12daa0c09df1e9ba7f2c657b49da

cve.org (CVE-2026-46100)

nvd.nist.gov (CVE-2026-46100)

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