CVE-2026-46100 (GCVE-0-2026-46100)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:59 – Updated: 2026-05-27 12:59
VLAI
Title
fs: afs: revert mmap_prepare() change
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9d5403b1036cdcd4be0f9f5568612c0e60e73d79 , < f51f85c044809fbd39ac8ae07ac99bc43ce32bd5 (git)
Affected: 9d5403b1036cdcd4be0f9f5568612c0e60e73d79 , < 48c7a0eaeea41da17d1d84d2d7a4c40be122b246 (git)
Affected: 9d5403b1036cdcd4be0f9f5568612c0e60e73d79 , < fbfc6578eaca12daa0c09df1e9ba7f2c657b49da (git)
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Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.18.27 , ≤ 6.18.* (semver)
Unaffected: 7.0.4 , ≤ 7.0.* (semver)
Unaffected: 7.1-rc1 , ≤ * (original_commit_for_fix)
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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