{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49553", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T02:08:31.590Z", "datePublished": "2025-02-26T02:14:02.183Z", "dateUpdated": "2026-08-05T08:55:39.688Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:55:39.688Z" }, "descriptions": [ { "lang": "en", "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" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/ntfs3/super.c" ], "versions": [ { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "58cf68a1886d14ffdc5c892ce483a82156769e88", "status": "affected", "versionType": "git" }, { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "4746c49b11b2403f5b5b07c6eac9e60663dcd9a3", "status": "affected", "versionType": "git" }, { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "a2b6986316a2d106f6951e76db70fa4b2fde64a9", "status": "affected", "versionType": "git" }, { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "a3b774342fa752a5290c0de36375289dfcf4a260", "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/ntfs3/super.c" ], "versions": [ { "version": "5.15", "status": "affected" }, { "version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.45", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17.13", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18.2", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19", "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": "5.15", "versionEndExcluding": "5.15.45" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "5.17.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "5.18.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "5.19" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/58cf68a1886d14ffdc5c892ce483a82156769e88" }, { "url": "https://git.kernel.org/stable/c/4746c49b11b2403f5b5b07c6eac9e60663dcd9a3" }, { "url": "https://git.kernel.org/stable/c/a2b6986316a2d106f6951e76db70fa4b2fde64a9" }, { "url": "https://git.kernel.org/stable/c/a3b774342fa752a5290c0de36375289dfcf4a260" } ], "title": "fs/ntfs3: validate BOOT sectors_per_clusters", "x_generator": { "engine": "bippy-1.2.0" } } } }