{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53988", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-24T10:53:46.175Z", "datePublished": "2025-12-24T10:55:27.762Z", "dateUpdated": "2026-08-05T09:16:30.837Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:16:30.837Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: Fix slab-out-of-bounds read in hdr_delete_de()\n\nHere is a BUG report from syzbot:\n\nBUG: KASAN: slab-out-of-bounds in hdr_delete_de+0xe0/0x150 fs/ntfs3/index.c:806\nRead of size 16842960 at addr ffff888079cc0600 by task syz-executor934/3631\n\nCall Trace:\n memmove+0x25/0x60 mm/kasan/shadow.c:54\n hdr_delete_de+0xe0/0x150 fs/ntfs3/index.c:806\n indx_delete_entry+0x74f/0x3670 fs/ntfs3/index.c:2193\n ni_remove_name+0x27a/0x980 fs/ntfs3/frecord.c:2910\n ntfs_unlink_inode+0x3d4/0x720 fs/ntfs3/inode.c:1712\n ntfs_rename+0x41a/0xcb0 fs/ntfs3/namei.c:276\n\nBefore using the meta-data in struct INDEX_HDR, we need to\ncheck index header valid or not. Otherwise, the corruptedi\n(or malicious) fs image can cause out-of-bounds access which\ncould make kernel panic." } ], "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 malicious INDEX_HDR fields arrive via a mounted NTFS volume (USB stick, loop-mounted image, NBD/VM disk), and the bug is triggered through a local rename()/unlink() syscall. No network protocol is involved, and physical access is not required since the image can be delivered as a file, so Local rather than Physical.\nAC:L - The attacker fully controls hdr->used, hdr->de_off and the entry size in the crafted image, so the oversized memmove length is chosen deterministically and fires on the first rename/unlink of the crafted directory entry. There is no race, no timing window, and no dependence on memory layout to reach the corruption.\nPR:N - The attacker needs no account or privilege on the target — they merely supply the crafted NTFS image or removable device, matching the established scoring for this ntfs3 hostile-image class. Once the volume is mounted, plain directory-write access is all that is needed to reach ntfs_rename().\nUI:R - A victim (or an automount daemon acting on their behalf, e.g. udisks2 on USB insertion) must mount the attacker's NTFS volume, and a rename/unlink must be performed against it. This is the standard user-interaction requirement for crafted-filesystem-image bugs.\nS:U - The out-of-bounds access corrupts kernel slab memory within the same kernel security authority. No VM, sandbox, or IOMMU boundary is crossed.\nC:H - The memmove reads up to ~16 MB past the slab object, and the callers immediately persist the buffer back to the volume via indx_write()/mi_write(), writing adjacent kernel heap contents onto the attacker's image for later retrieval. That is a large, effectively unbounded kernel-memory disclosure primitive.\nI:H - The same memmove writes that attacker-influenced multi-megabyte length starting inside the index buffer, overwriting arbitrary adjacent slab objects with shifted heap data. Heap corruption of this magnitude is leverageable for control-flow hijack and privilege escalation.\nA:H - An unbounded ~16 MB memmove past a ~1 KB kmalloc object destroys allocator metadata and touches unmapped memory, producing the KASAN-reported fault and a kernel panic. The commit message explicitly states the corrupted image \"could make kernel panic.\"" } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/ntfs3/fslog.c", "fs/ntfs3/index.c", "fs/ntfs3/ntfs_fs.h" ], "versions": [ { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "c58ea97aa94f033ee64a8cb6587d84a9849b6216", "status": "affected", "versionType": "git" }, { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "9163a5b4ed290da4a7d23fa92533e0e81fd0166e", "status": "affected", "versionType": "git" }, { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "114204d25e1dffdd3a0c1cfbba219afd344f4b4f", "status": "affected", "versionType": "git" }, { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "4a034ece7e2877673d9085d6e7ed45e6ee40b761", "status": "affected", "versionType": "git" }, { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "ab84eee4c7ab929996602eda7832854c35a6dda2", "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/fslog.c", "fs/ntfs3/index.c", "fs/ntfs3/ntfs_fs.h" ], "versions": [ { "version": "5.15", "status": "affected" }, { "version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.111", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.28", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2.15", "lessThanOrEqual": "6.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.3.2", "lessThanOrEqual": "6.3.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.4", "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": "5.15.111" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.28" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.2.15" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.3.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.4" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/c58ea97aa94f033ee64a8cb6587d84a9849b6216" }, { "url": "https://git.kernel.org/stable/c/9163a5b4ed290da4a7d23fa92533e0e81fd0166e" }, { "url": "https://git.kernel.org/stable/c/114204d25e1dffdd3a0c1cfbba219afd344f4b4f" }, { "url": "https://git.kernel.org/stable/c/4a034ece7e2877673d9085d6e7ed45e6ee40b761" }, { "url": "https://git.kernel.org/stable/c/ab84eee4c7ab929996602eda7832854c35a6dda2" } ], "title": "fs/ntfs3: Fix slab-out-of-bounds read in hdr_delete_de()", "x_generator": { "engine": "bippy-1.2.0" } } } }