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[ CVE-2026-98139 · Published 25 Sep 2026 ]

Vulnerability in Linux

CVSS 5.5 EPSS <1%1 agency advisoryFix available

[ Description ]Official description

In 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.

[ Fixes ]Fixes and patches

[ Advisories ]Government CERT advisories

[ References ]References