305 lines
15 KiB
JSON
305 lines
15 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-2024-41019",
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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": "2024-07-12T12:17:45.613Z",
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"datePublished": "2024-07-29T06:37:05.300Z",
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"dateUpdated": "2026-08-05T11:34:45.331Z"
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},
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:34:45.331Z"
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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 ff offset\n\nThis adds sanity checks for ff offset. There is a check\non rt->first_free at first, but walking through by ff\nwithout any check. If the second ff is a large offset.\nWe may encounter an out-of-bound read."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/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 vulnerable code is reached only through `mount()` of a crafted NTFS volume, whose `$LogFile` is parsed by `log_replay()` during `ntfs_fill_super()`. No network or remote peer is involved, and the image can be supplied as a local file/loop device rather than requiring physical media, so Local is the correct (and higher-severity) vector versus Physical.\nAC:L - Every field driving the bug (`rt->size`, `rt->used`, `rt->first_free`, `rt->last_free`, and the free-list words) is attacker-authored data in the image, so the out-of-bounds offset is chosen deterministically with no race, memory-layout guess, or environmental precondition.\nPR:L - ntfs3 is `FS_REQUIRES_DEV` without `FS_USERNS_MOUNT`, so mounting is not reachable from an unprivileged user namespace, but on desktop/kiosk/workstation deployments an ordinary logged-in local user can get an attacker-supplied NTFS volume mounted via udisks2/automount policy without any administrative credential.\nUI:N - The attacker performs the mount themselves (or automount/udisks2 does it the moment the device appears) and log replay runs unconditionally on every mount, read-only included; no separate victim has to open a file or take any action.\nS:U - The out-of-bounds accesses occur in kernel memory within the same security authority that already owns the mount; no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - The unvalidated free-list walk performs 4-byte reads at attacker-chosen offsets of up to ~4 GB beyond the slab object, and the walk's outcome (terminate, hit `RESTART_ENTRY_ALLOCATED`, or spin) is observable through mount success/failure, turning the wild reads into a probing oracle over kernel heap contents.\nI:H - Because `check_rstbl()` is the sole validator of `first_free`/`last_free` before the tables reach `free_rsttbl_idx()`, `alloc_rsttbl_idx()`, and `extend_rsttbl()`, a corrupted list yields out-of-bounds 4-byte slab writes with attacker-influenced values (`*(__le32 *)Add2Ptr(rt, lf) = off_le`, `*last_e = *e`), which is heap corruption usable for control-flow-relevant metadata overwrite.\nA:H - A wild read up to 4 GB from the buffer readily faults on unmapped kernel memory, producing an oops/panic, and a cyclic free list makes the unbounded `for (off = ff; off;)` / `for (;;)` walks loop forever with no reschedule, hanging the mounting task and CPU."
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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/fslog.c"
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"version": "0",
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"status": "unaffected",
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"lessThanOrEqual": "5.15.*",
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