CVE-2026-98446
xfs: don't let hidden_space go negative in xfs_metafile_resv_init
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Oct 18, 2026 |
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Affected Versions
Linux / Linux
1df8d75030b787a9fae270b59b93eef809dd2011 < 930a9c1c321efdaa3e7f8caecb0479cee3baf342 1df8d75030b787a9fae270b59b93eef809dd2011 < f0d8352a39f4a2e329ae45b71bb0d49e2ca0a6dc 1df8d75030b787a9fae270b59b93eef809dd2011 < 476582d754cdc5110f806001417fea6c77824c13
Linux / Linux
6.15