CVE-2026-98446
Unknown
Description
In the Linux kernel, the following vulnerability has been resolved: xfs: don't let hidden_space go negative in xfs_metafile_resv_init LOLLM points out that if the amount of fdblocks that we can reserve for a metadata btree file goes below the space already used by that file, then the hidden_space subtraction can underflow, causing xfs_dec_fdblocks to subtract a huge amount of space. We never want the target to be less than the used sapce, so fix the logic that adjusts dblocks_avail downwards. Also fix an error in the adjacent comment.
SeverityUnknown
CVSS—
Exploit probability—
Product
Linux
PublishedOct 18, 2026
First seenOct 18, 2026
How to fix
Update
- Linux Linux930a9c1c321efdaa3e7f8caecb0479cee3baf342, f0d8352a39f4a2e329ae45b71bb0d49e2ca0a6dc, 476582d754cdc5110f806001417fea6c77824c13 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 1df8d75030b787a9fae270b59b93eef809dd2011 ≤ v < 930a9c1c321efdaa3e7f8caecb0479cee3baf342, 1df8d75030b787a9fae270b59b93eef809dd2011 ≤ v < f0d8352a39f4a2e329ae45b71bb0d49e2ca0a6dc, 1df8d75030b787a9fae270b59b93eef809dd2011 ≤ v < 476582d754cdc5110f806001417fea6c77824c13, 6.15 | 930a9c1c321efdaa3e7f8caecb0479cee3baf342, f0d8352a39f4a2e329ae45b71bb0d49e2ca0a6dc, 476582d754cdc5110f806001417fea6c77824c13 |
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