CVE-2025-40067
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.
How to fix
- Linux Linuxaab2e34b139f6df71ab2b1adeec9927c206adc79, 978aac54e93ea35aab20b32ae393d3d33964e7ae, be66551da203862c689c12e1d35ce87217c017c1, 039ddf353cc33f6546a87ec1ac3210637d714bec, 0dc7117da8f92dd5fe077d712a756eccbe377d40, 6.6.112, 6.12.53, 6.16, 6.17 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 47856e10f8d5e066aa26b1f9c02d933fe0620399 ≤ v < aab2e34b139f6df71ab2b1adeec9927c206adc79, b35a50d639ca5259466ef5fea85529bb4fb17d5b ≤ v < 978aac54e93ea35aab20b32ae393d3d33964e7ae, 3ed2cc6a6e93fbeb8c0cafce1e7fb1f64a331dcc ≤ v < be66551da203862c689c12e1d35ce87217c017c1, d99208b91933fd2a58ed9ed321af07dacd06ddc3 ≤ v < 039ddf353cc33f6546a87ec1ac3210637d714bec, d99208b91933fd2a58ed9ed321af07dacd06ddc3 ≤ v < 0dc7117da8f92dd5fe077d712a756eccbe377d40, 358d4f821c03add421a4c49290538a705852ccf1, a285395020780adac1ffbc844069c3d700bf007a, 6.6.102 ≤ v < 6.6.112, 6.12.42 ≤ v < 6.12.53, 6.15.10 ≤ v < 6.16, 6.16.1 ≤ v < 6.17, 6.17 | aab2e34b139f6df71ab2b1adeec9927c206adc79, 978aac54e93ea35aab20b32ae393d3d33964e7ae, be66551da203862c689c12e1d35ce87217c017c1, 039ddf353cc33f6546a87ec1ac3210637d714bec, 0dc7117da8f92dd5fe077d712a756eccbe377d40, 6.6.112, 6.12.53, 6.16, 6.17 |
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