CVE-2025-40067 - fs/ntfs3: reject index allocation if $BITMAP is empty but blocks exist

CVE-2025-40067 - fs/ntfs3: reject index allocation if $BITMAP is empty but blocks exist

https://cvefeed.io/rssfeed/latest.atom / Tue, 10/28/2025 - 13:45
CVE ID : CVE-2025-40067
Published : Oct. 28, 2025, 12:15 p.m. | 17 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: reject index allocation if $BITMAP is empty but blocks exist Index allocation requires at least one bit in the $BITMAP attribute to track usage of index entries. If the bitmap is empty while index blocks are already present, this reflects on-disk corruption. syzbot triggered this condition using a malformed NTFS image. During a rename() operation involving a long filename (which spans multiple index entries), the empty bitmap allowed the name to be added without valid tracking. Subsequent deletion of the original entry failed with -ENOENT, due to unexpected index state. Reject such cases by verifying that the bitmap is not empty when index blocks exist.
Severity: 0.0 | NA
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