CVE-2022-50869 (GCVE-0-2022-50869)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:15 – Updated: 2026-08-05 08:59
VLAI
Title
fs/ntfs3: Fix slab-out-of-bounds in r_page
Summary
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Fix slab-out-of-bounds in r_page When PAGE_SIZE is 64K, if read_log_page is called by log_read_rst for the first time, the size of *buffer would be equal to DefaultLogPageSize(4K).But for *buffer operations like memcpy, if the memory area size(n) which being assigned to buffer is larger than 4K (log->page_size(64K) or bytes(64K-page_off)), it will cause an out of boundary error. Call trace: [...] kasan_report+0x44/0x130 check_memory_region+0xf8/0x1a0 memcpy+0xc8/0x100 ntfs_read_run_nb+0x20c/0x460 read_log_page+0xd0/0x1f4 log_read_rst+0x110/0x75c log_replay+0x1e8/0x4aa0 ntfs_loadlog_and_replay+0x290/0x2d0 ntfs_fill_super+0x508/0xec0 get_tree_bdev+0x1fc/0x34c [...] Fix this by setting variable r_page to NULL in log_read_rst.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < ed686e7a26dd19ae6b46bb662f735acfa88ff7bc (git)
Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < bf86a640a34947d92062996e1a75b9cd9d83dd19 (git)
Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < 6d076293e5bffdf897ea5f975669206e09beed6a (git)
Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < ecfbd57cf9c5ca225184ae266ce44ae473792132 (git)
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Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.15.87 , ≤ 5.15.* (semver)
Unaffected: 6.0.17 , ≤ 6.0.* (semver)
Unaffected: 6.1.3 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ntfs3/fslog.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          "vendor": "Linux",
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              "version": "0",
              "versionType": "semver"
            },
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              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.17",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.1.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.87",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.17",
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                  "vulnerable": true
                },
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              "negate": false,
              "operator": "OR"
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: Fix slab-out-of-bounds in r_page\n\nWhen PAGE_SIZE is 64K, if read_log_page is called by log_read_rst for\nthe first time, the size of *buffer would be equal to\nDefaultLogPageSize(4K).But for *buffer operations like memcpy,\nif the memory area size(n) which being assigned to buffer is larger\nthan 4K (log-\u003epage_size(64K) or bytes(64K-page_off)), it will cause\nan out of boundary error.\n Call trace:\n  [...]\n  kasan_report+0x44/0x130\n  check_memory_region+0xf8/0x1a0\n  memcpy+0xc8/0x100\n  ntfs_read_run_nb+0x20c/0x460\n  read_log_page+0xd0/0x1f4\n  log_read_rst+0x110/0x75c\n  log_replay+0x1e8/0x4aa0\n  ntfs_loadlog_and_replay+0x290/0x2d0\n  ntfs_fill_super+0x508/0xec0\n  get_tree_bdev+0x1fc/0x34c\n  [...]\n\nFix this by setting variable r_page to NULL in log_read_rst."
        }
      ],
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            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is reached only by presenting a crafted NTFS volume to the in-kernel ntfs3 driver so mount runs ntfs_fill_super\u2192ntfs_loadlog_and_replay\u2192log_replay\u2192log_read_rst\u2192read _log_page; this is a local block-device/loop/USB image path with no network protocol handler.\nAC:L - On 16K/64K PAGE_SIZE kernels log-\u003epage_size exceeds the fixed 4K r_page allocation so the first read_log_page deterministically overflows; on 4K kernels a crafted on-disk sys_page_size \u003c 4096 takes the realloc path and overflows the same way, with no race or uncontrollable layout dependency.\nPR:N - The attacker needs no account on the target\u2014the payload is solely a malicious NTFS image (USB stick, disk image, or media handed to udisks2/automount on desktops, kiosks, Android, or automotive systems), matching other ntfs3 image-parsing scores.\nUI:R - Someone must mount the volume or insert the media into a system that automounts it; ntfs3 is FS_REQUIRES_DEV without FS_USERNS_MOUNT, so an unprivileged userns cannot mount it alone.\nS:U - The slab out-of-bounds write corrupts host kernel heap within the same security authority as the mounting kernel; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - ntfs_read_run_nb memcpy\u0027s up to tens of KiB of attacker-controlled $LogFile bytes past a 4K slab object into adjacent heap, enabling classic heap-overlap disclosure primitives consistent with memory-corruption guidance.\nI:H - This is a large attacker-controlled slab out-of-bounds write (disk contents into undersized r_page), providing a heap write primitive suitable for adjacent-object corruption and control-flow hijack.\nA:H - The commit\u0027s KASAN stack shows a slab-out-of-bounds fault in ntfs_read_run_nb during mount that oopses/panics the kernel, fully denying availability."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:59:54.196Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/ed686e7a26dd19ae6b46bb662f735acfa88ff7bc"
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        },
        {
          "url": "https://git.kernel.org/stable/c/ecfbd57cf9c5ca225184ae266ce44ae473792132"
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      ],
      "title": "fs/ntfs3: Fix slab-out-of-bounds in r_page",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50869",
    "datePublished": "2025-12-30T12:15:39.879Z",
    "dateReserved": "2025-12-30T12:06:07.136Z",
    "dateUpdated": "2026-08-05T08:59:54.196Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:17:31+00:00",
      "cve": "CVE-2022-50869",
      "id": "CVE-2022-50869",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: fs/ntfs3: Fix slab-out-of-bounds in r_page",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50869.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-31T01:30:05Z",
      "cve": "CVE-2022-50869",
      "id": "CVE-2022-50869",
      "initial_release_date": "2025-12-31T00:30:52Z",
      "product_status:known_not_affected": "453",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50869",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50869.json",
      "version": "11"
    }
  }
}



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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.