Linux kernel: NTFS kmap_local leak on write_mft_record_nolock error paths
CVE-2026-98140 Published on September 25, 2026
ntfs: fix kmap_local leak in write_mft_record_nolock() error paths
In the Linux kernel, the following vulnerability has been resolved:
ntfs: fix kmap_local leak in write_mft_record_nolock() error paths
write_mft_record_nolock() maps the MFT record folio with
kmap_local_folio(), but the pre_write_mst_fixup() and
bio_add_folio() failure paths jump to the error label without
unmapping it. kmap_local mappings are stack-ordered per task, so
leaking one corrupts the nesting for any outer mapping.
Unmap the folio on those error paths too.
Products Associated with CVE-2026-98140
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Affected Versions
Linux:- Version 115380f9a2f9675c7924563cbba70d40cae8fb81 and below 5d7f7bf8fba8cf563b42b44aa4ab3d9928ac480c is affected.
- Version 115380f9a2f9675c7924563cbba70d40cae8fb81 and below cf06dcd572845723821b54a608fc2da995c3c8e2 is affected.
- Version 7.1 is affected.
- Before 7.1 is unaffected.
- Version 7.2.7, <= 7.2.* is unaffected.
- Version 7.3-rc2, <= * is unaffected.