ntfs: free volume-wide resources on fill_super failure

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Summary

CVECVE-2026-72205
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:21:39 UTC
Updated2026-08-18 07:16:53 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ntfs: free volume-wide resources on fill_super failure ntfs_fill_super()'s err_out_now path frees only the volume struct via kfree(vol), leaving several vol-owned allocations behind on every mount failure: - vol->nls_map, loaded by ntfs_init_fs_context() via load_nls_default() (or replaced by an explicit nls= option in ntfs_parse_param()), is never unload_nls()'d. - vol->volume_label, allocated by load_system_files() through ntfs_ucstonls() once the $Volume name attribute has been parsed, is not released by load_system_files()'s own error labels nor by the fill_super() inline cleanup that only runs on d_make_root() failure. Any later failure inside load_system_files() leaks it. - vol->lcn_empty_bits_per_page was kvfree()'d in unl_upcase_iput_tmp_ino_err_out_now without clearing the pointer, so it could not be folded into a single common cleanup. Because the failure paths never call ntfs_volume_free() and never reach the d_make_root() inline cleanup block (it sits above the label and is jumped over by the load_system_files() / kvmalloc failure gotos), these resources accumulate per failed mount attempt with no chance of recovery short of unloading the module. This is a silent leak: the inodes loaded prior to failure remain hashed but generic_shutdown_super() skips evict_inodes() when sb->s_root is unset, so no CHECK_DATA_CORRUPTION warning is emitted either. Move the per-volume frees down to err_out_now and drop the lcn_empty_bits_per_page kvfree() from the upper label so the cleanup is performed exactly once on every failure path. Using unconditional kvfree() / kfree() / unload_nls() is safe because they all accept NULL and the upper labels that previously freed nls_map (the d_make_root() inline cleanup) already clear the pointer.

Risk And Classification

EPSS: 0.001980000 probability, percentile 0.099240000 (date 2026-08-17)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 6251f0b0de7d645e3591931ca4c11d8322c1866f aca3d383a23cb7f3a2849c09fda3974f1838d941 git Not specified
CNA Linux Linux affected 6251f0b0de7d645e3591931ca4c11d8322c1866f a9523a7d3b24b3a6b25ec1eb668ee6618cacf05e git Not specified
CNA Linux Linux affected 7.1 Not specified
CNA Linux Linux unaffected 7.1 semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/a9523a7d3b24b3a6b25ec1eb668ee6618cacf05e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/aca3d383a23cb7f3a2849c09fda3974f1838d941 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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