CVE-2023-54063 (GCVE-0-2023-54063)

Vulnerability from cvelistv5 – Published: 2025-12-24 12:23 – Updated: 2026-08-05 09:16
VLAI
Title
fs/ntfs3: Fix OOB read in indx_insert_into_buffer
Summary
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Fix OOB read in indx_insert_into_buffer Syzbot reported a OOB read bug: BUG: KASAN: slab-out-of-bounds in indx_insert_into_buffer+0xaa3/0x13b0 fs/ntfs3/index.c:1755 Read of size 17168 at addr ffff8880255e06c0 by task syz-executor308/3630 Call Trace: <TASK> memmove+0x25/0x60 mm/kasan/shadow.c:54 indx_insert_into_buffer+0xaa3/0x13b0 fs/ntfs3/index.c:1755 indx_insert_entry+0x446/0x6b0 fs/ntfs3/index.c:1863 ntfs_create_inode+0x1d3f/0x35c0 fs/ntfs3/inode.c:1548 ntfs_create+0x3e/0x60 fs/ntfs3/namei.c:100 lookup_open fs/namei.c:3413 [inline] If the member struct INDEX_BUFFER *index of struct indx_node is incorrect, that is, the value of __le32 used is greater than the value of __le32 total in struct INDEX_HDR. Therefore, OOB read occurs when memmove is called in indx_insert_into_buffer(). Fix this by adding a check in hdr_find_e().
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < cd7e1d67924081717c5c96ead758a1a77867689a (git)
Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < 17048287ac79abd33b275ac3b5738285d406481b (git)
Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < a7e5dba10ba1402dd6c2f961a70320770865c4a5 (git)
Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < 4bf3b564e27a518f158a83d5e1a50064ed6136a0 (git)
Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < b8c44949044e5f7f864525fdffe8e95135ce9ce5 (git)
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Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.15.111 , ≤ 5.15.* (semver)
Unaffected: 6.1.28 , ≤ 6.1.* (semver)
Unaffected: 6.2.15 , ≤ 6.2.* (semver)
Unaffected: 6.3.2 , ≤ 6.3.* (semver)
Unaffected: 6.4 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: Fix OOB read in indx_insert_into_buffer\n\nSyzbot reported a OOB read bug:\n\nBUG: KASAN: slab-out-of-bounds in indx_insert_into_buffer+0xaa3/0x13b0\nfs/ntfs3/index.c:1755\nRead of size 17168 at addr ffff8880255e06c0 by task syz-executor308/3630\n\nCall Trace:\n \u003cTASK\u003e\n memmove+0x25/0x60 mm/kasan/shadow.c:54\n indx_insert_into_buffer+0xaa3/0x13b0 fs/ntfs3/index.c:1755\n indx_insert_entry+0x446/0x6b0 fs/ntfs3/index.c:1863\n ntfs_create_inode+0x1d3f/0x35c0 fs/ntfs3/inode.c:1548\n ntfs_create+0x3e/0x60 fs/ntfs3/namei.c:100\n lookup_open fs/namei.c:3413 [inline]\n\nIf the member struct INDEX_BUFFER *index of struct indx_node is\nincorrect, that is, the value of __le32 used is greater than the value\nof __le32 total in struct INDEX_HDR. Therefore, OOB read occurs when\nmemmove is called in indx_insert_into_buffer().\nFix this by adding a check in hdr_find_e()."
        }
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            "version": "3.1"
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              "value": "AV:L - The vulnerability is triggered by mounting a crafted NTFS3 image and then performing an ordinary directory operation (create/mkdir/rename) on it, which is purely local \u2014 syscall/VFS access plus a block device or loop-backed image. No network-facing service parses this data.\nAC:L - The attacker fully authors the on-disk INDEX_ROOT that supplies the oversized `to_move`, so the overflow is deterministic and repeatable with no race, timing window, or uncontrolled memory-layout dependency.\nPR:L - Once the volume is mounted, the vulnerable path (`ntfs_create`/`ntfs_mkdir`/rename \u2192 `indx_insert_entry`) is reachable by any unprivileged user with write access to a directory, and on desktop/kiosk/automotive systems udisks2 or systemd automount lets an ordinary local-session user mount their own crafted NTFS media without additional privilege.\nUI:N - The attacker performs both steps \u2014 supplying/mounting the crafted image via automount and issuing the file-creation syscall \u2014 with no action required from any other user; this matches the established scoring for the sibling ntfs3 crafted-image CVEs.\nS:U - The corruption is confined to kernel slab memory within the same security authority; there is no VM, IOMMU, or sandbox boundary crossed.\nC:H - The `memmove()` in `indx_insert_into_buffer()` reads up to ~17 KB of adjacent kernel slab data (heap pointers, other objects) into the index buffer, which `indx_write()` then persists to disk where the attacker can read it back from their own image \u2014 a direct kernel-heap disclosure primitive.\nI:H - `hdr_insert_head()` performs an unchecked `memmove`/`memcpy` past the end of the `kmalloc(1u \u003c\u003c index_bits)` index buffer with attacker-controlled length and attacker-authored entry bytes, giving a controllable slab overflow that can overwrite adjacent objects and be leveraged for arbitrary write and control-flow hijack.\nA:H - The out-of-bounds access produced a KASAN slab-out-of-bounds report and, on production kernels, corrupts adjacent slab objects and heap metadata, reliably leading to an oops or panic."
            }
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        "dateUpdated": "2026-08-05T09:16:51.916Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/cd7e1d67924081717c5c96ead758a1a77867689a"
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          "url": "https://git.kernel.org/stable/c/b8c44949044e5f7f864525fdffe8e95135ce9ce5"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54063",
    "datePublished": "2025-12-24T12:23:09.346Z",
    "dateReserved": "2025-12-24T12:21:05.092Z",
    "dateUpdated": "2026-08-05T09:16:51.916Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.2",
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      "date": "2026-08-13",
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    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-08-13T18:54:37+00:00",
      "cve": "CVE-2023-54063",
      "id": "CVE-2023-54063",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Out-of-bounds read in NTFS3 filesystem driver",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-54063.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-23T02:13:13Z",
      "cve": "CVE-2023-54063",
      "id": "CVE-2023-54063",
      "initial_release_date": "2025-12-25T00:56:31Z",
      "product_status:known_not_affected": "453",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-54063",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-54063.json",
      "version": "10"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.