{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72207","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-08-09T03:40:39.912Z","datePublished":"2026-08-15T05:54:03.281Z","dateUpdated":"2026-08-18T06:56:27.219Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-18T06:56:27.219Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: not change 0-byte $DATA attribute to non-resident\n\nWhen ntfs_resident_attr_resize() cannot grow a resident attribute in\nplace, it retries after converting other resident attributes to\nnon-resident to free space in the MFT recrord.\n\nDo not select zero-length resident $DATA attributes for this conversion.\nfsck treats 0-byte non-resident $DATA attribute as corruptions."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL"},"scenarios":[{"lang":"en","value":"AV:N - ntfs_resident_attr_resize() is reached from VFS write/truncate/fallocate paths (ntfs_attr_expand, __ntfs_attr_truncate_vfs); fs/ntfs registers ntfs_export_ops, so remote NFS or ksmbd clients writing to an exported rw NTFS share can trigger the corrupting conversion without local shell access.\nAC:L - An attacker can deterministically pack an MFT record with a resident 0-byte $DATA attribute plus other resident attributes, then grow a different resident attribute to force -ENOSPC and select that $DATA for conversion; no races or victim-specific memory layout are required.\nPR:N - Exploitation requires only permission to write or truncate files on a mounted NTFS volume (local user with directory write access, authenticated SMB/NFS client, or guest/anonymous write on a misconfigured export); mounting is environmental setup, not a privilege needed during the trigger.\nUI:N - Once an administrator has rw-mounted and optionally exported the NTFS volume (or automounted dual-boot/shared storage), the attacker drives write/truncate operations that exhaust MFT record space; no further victim clicks, opens, or cooperative actions are required beyond that standing configuration.\nS:U - Impact is confined to on-disk NTFS $DATA metadata corruption and subsequent filesystem operation failure within the host kernel/filesystem security authority; this is standard local or network filesystem exploitation, not a VM escape or cross-authority sandbox breakout.\nC:H - Converting a 0-byte resident $DATA to non-resident writes structurally invalid on-disk metadata that ntfsck/fsck treat as corruption; subsequent attribute lookups and data reads on the affected inode parse attacker-influenced corrupt non-resident layout and may read beyond intended attribute bounds.\nI:H - The bug persistently corrupts MFT $DATA records by creating invalid 0-byte non-resident attributes, enabling attacker-steerable on-disk metadata modification beyond the intended filesystem state that repair tools flag as corruption and that can render affected files or volumes inconsistent across OSes.\nA:H - Corrupt 0-byte non-resident $DATA attributes cause fsck/ntfsck failures and can leave affected files or volumes unusable on remount or when accessed from Windows or Linux; persistent on-disk corruption that blocks reliable filesystem access scores Availability High."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ntfs/attrib.c"],"versions":[{"version":"495e90fa334828d4119061e2726af51d0a0fb4ed","lessThan":"ceb49c37250125d418410988f2376ed4d57a6706","status":"affected","versionType":"git"},{"version":"495e90fa334828d4119061e2726af51d0a0fb4ed","lessThan":"0aad21570197973af4a1b25b3fb8ed3aeb9e7670","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ntfs/attrib.c"],"versions":[{"version":"7.1","status":"affected"},{"version":"0","lessThan":"7.1","status":"unaffected","versionType":"semver"},{"version":"7.1.5","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.1","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.1","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/ceb49c37250125d418410988f2376ed4d57a6706"},{"url":"https://git.kernel.org/stable/c/0aad21570197973af4a1b25b3fb8ed3aeb9e7670"}],"title":"ntfs: not change 0-byte $DATA attribute to non-resident","x_generator":{"engine":"bippy-1.2.0"}}}}