ntfs: only count successfully cleared runs when freeing clusters

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Summary

CVECVE-2026-98139
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-25 11:17:45 UTC
Updated2026-09-30 14:10:59 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ntfs: only count successfully cleared runs when freeing clusters ntfs_cluster_free_from_rl_nolock() adds a run's length to nr_freed whenever the error bookkeeping condition is false, which includes cases where ntfs_bitmap_clear_run() actually failed - e.g. a second run failing with the same errno as an earlier one, or any failure after a non-ENOMEM error was already recorded. Since a failed ntfs_bitmap_clear_run() rolls back its partial modifications, no bits were cleared for that run, yet its length still inflates vol->free_clusters, corrupting statfs output and the allocator's free space gate. Only count runs whose bitmap clear succeeded.

Risk And Classification

EPSS: 0.001770000 probability, percentile 0.065080000 (date 2026-09-27)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 11ccc9107dc460de28af90fac1f42404d9802735 7eb97d8828e7758b9c81277f7802e740a800f78a git Not specified
CNA Linux Linux affected 11ccc9107dc460de28af90fac1f42404d9802735 be9e89ccb8e52a3e4b67feeb03ebd8133091dc7e git Not specified
CNA Linux Linux affected 7.1 Not specified
CNA Linux Linux unaffected 7.1 semver Not specified
CNA Linux Linux unaffected 7.2.7 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/7eb97d8828e7758b9c81277f7802e740a800f78a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/be9e89ccb8e52a3e4b67feeb03ebd8133091dc7e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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