180 lines
9.6 KiB
JSON
180 lines
9.6 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2022-49553",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-02-26T02:08:31.590Z",
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"datePublished": "2025-02-26T02:14:02.183Z",
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"dateUpdated": "2026-08-05T08:55:39.688Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T08:55:39.688Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: validate BOOT sectors_per_clusters\n\nWhen the NTFS BOOT sectors_per_clusters field is > 0x80, it represents a\nshift value. Make sure that the shift value is not too large before using\nit (NTFS max cluster size is 2MB). Return -EVINVAL if it too large.\n\nThis prevents negative shift values and shift values that are larger than\nthe field size.\n\nPrevents this UBSAN error:\n\n UBSAN: shift-out-of-bounds in ../fs/ntfs3/super.c:673:16\n shift exponent -192 is negative"
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}
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],
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"metrics": [
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{
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The bug is reached only by mounting a crafted NTFS block device/image so ntfs_init_from_boot reads attacker-controlled BOOT.sectors_per_clusters; there is no network or adjacent-protocol entry into fs/ntfs3.\nAC:L - A malicious BOOT with sectors_per_clusters in 0x81–0xF3 deterministically triggers the out-of-bounds shift in true_sectors_per_clst(); the attacker fully controls that field with no race or special memory layout required.\nPR:N - The attacker needs no account on the target—only a malicious NTFS image (USB stick, disk/container image, or media presented to udisks2/automount), matching the established hostile-image scoring for this ntfs3 class.\nUI:R - ntfs3 is FS_REQUIRES_DEV without FS_USERNS_MOUNT, so a victim or automount daemon must mount the attacker-supplied volume before the vulnerable boot-sector parse runs.\nS:U - Impact is confined to the host kernel’s handling of the mounted volume under the same OS security authority; it is not a VM escape, IOMMU bypass, or sandbox boundary crossing.\nC:H - The undefined shift yields attacker-influenced sectors_per_cluster/cluster_size geometry that can pass mount checks and drive subsequent NTFS parsing; wrong cluster geometry enables out-of-bounds reads of kernel/on-disk structures, so Confidentiality is High.\nI:H - The same poisoned cluster_size/cluster_bits feed allocation, MFT, and runlist paths that perform size-based copies and updates, enabling heap/metadata corruption and control-flow hijack primitives; Integrity is High.\nA:H - The demonstrated UBSAN shift-out-of-bounds in ntfs_fill_super and subsequent operations on invalid cluster geometry can oops/panic the kernel, so Availability impact is High."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/ntfs3/super.c"
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],
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"lessThanOrEqual": "5.15.*",
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},
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{
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"version": "5.18.2",
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"lessThanOrEqual": "5.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.19",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/58cf68a1886d14ffdc5c892ce483a82156769e88"
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{
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"url": "https://git.kernel.org/stable/c/a3b774342fa752a5290c0de36375289dfcf4a260"
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}
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],
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"title": "fs/ntfs3: validate BOOT sectors_per_clusters",
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