CVE-2026-98446
Received
Received - Intake
XFS Filesystem Metadata Reservation Integer Underflow
Vulnerability report for CVE-2026-98446, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-18
Last updated on: 2026-10-18
Assigner: kernel.org
Description
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.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Linux | Linux | 1df8d75030b787a9fae270b59b93eef809dd2011 |
| Linux | Linux | 1df8d75030b787a9fae270b59b93eef809dd2011 |
| Linux | Linux | 1df8d75030b787a9fae270b59b93eef809dd2011 |
| Linux | Linux | 6.15 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
