Linux kernel: netfs streaming write folio invalidation bug
CVE-2026-64157 Published on July 19, 2026
netfs: Fix partial invalidation of streaming-write folio
In the Linux kernel, the following vulnerability has been resolved:
netfs: Fix partial invalidation of streaming-write folio
In netfs_invalidate_folio(), if the region of a partial invalidation
overlaps the front (but not all) of a dirty write cached in a streaming
write page (dirty, but not uptodate, with the dirty region tracked by a
netfs_folio struct), the function modifies the dirty region - but
incorrectly as it moves the region forward by setting the start to the
start, not the end, of the invalidation region.
Fix this by setting finfo->dirty_offset to the end of the invalidation
region (iend).
Products Associated with CVE-2026-64157
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Affected Versions
Linux:- Version cce6bfa6ca0e30af9927b0074c97fe6a92f28092 and below f6b2569ae29b666fd15ff2848684c445ba442a39 is affected.
- Version cce6bfa6ca0e30af9927b0074c97fe6a92f28092 and below 3d9601c029b934b5b6a10f99791467b10eb6b211 is affected.
- Version cce6bfa6ca0e30af9927b0074c97fe6a92f28092 and below 6a3d27116be2c5fb9a03d5cf37c486ac517f3689 is affected.
- Version cce6bfa6ca0e30af9927b0074c97fe6a92f28092 and below 6d91acc7fb85d33ea58fca9b964a32a453937f4b is affected.
- Version e2814004138a541110d4b2dc254a8f619c2c4ce0 is affected.
- Version 6.10.8 and below 6.11 is affected.
- Version 6.11 is affected.
- Before 6.11 is unaffected.
- Version 6.12.92, <= 6.12.* is unaffected.
- Version 6.18.34, <= 6.18.* is unaffected.
- Version 7.0.11, <= 7.0.* is unaffected.
- Version 7.1, <= * is unaffected.