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CVE-2022-50864 (GCVE-0-2022-50864)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:15 – Updated: 2026-05-11 19:26
VLAI
Title
nilfs2: fix shift-out-of-bounds due to too large exponent of block size
Summary
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix shift-out-of-bounds due to too large exponent of block size If field s_log_block_size of superblock data is corrupted and too large, init_nilfs() and load_nilfs() still can trigger a shift-out-of-bounds warning followed by a kernel panic (if panic_on_warn is set): shift exponent 38973 is too large for 32-bit type 'int' Call Trace: <TASK> dump_stack_lvl+0xcd/0x134 ubsan_epilogue+0xb/0x50 __ubsan_handle_shift_out_of_bounds.cold.12+0x17b/0x1f5 init_nilfs.cold.11+0x18/0x1d [nilfs2] nilfs_mount+0x9b5/0x12b0 [nilfs2] ... This fixes the issue by adding and using a new helper function for getting block size with sanity check.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f , < ec93b5430ec0f60877a5388bb023d60624f9ab9f (git)
Affected: 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f , < 8b6ef451b5701b37d9a5905534595776a662edfc (git)
Affected: 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f , < ddb6615a168f97b91175e00eda4c644741cf531c (git)
Affected: 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f , < a16731fa1b96226c75bbf18e73513b14fc318360 (git)
Affected: 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f , < ebeccaaef67a4895d2496ab8d9c2fb8d89201211 (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.30
Unaffected: 0 , < 2.6.30 (semver)
Unaffected: 5.10.163 , ≤ 5.10.* (semver)
Unaffected: 5.15.86 , ≤ 5.15.* (semver)
Unaffected: 6.0.16 , ≤ 6.0.* (semver)
Unaffected: 6.1.2 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
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          "product": "Linux",
          "programFiles": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix shift-out-of-bounds due to too large exponent of block size\n\nIf field s_log_block_size of superblock data is corrupted and too large,\ninit_nilfs() and load_nilfs() still can trigger a shift-out-of-bounds\nwarning followed by a kernel panic (if panic_on_warn is set):\n\n shift exponent 38973 is too large for 32-bit type \u0027int\u0027\n Call Trace:\n  \u003cTASK\u003e\n  dump_stack_lvl+0xcd/0x134\n  ubsan_epilogue+0xb/0x50\n  __ubsan_handle_shift_out_of_bounds.cold.12+0x17b/0x1f5\n  init_nilfs.cold.11+0x18/0x1d [nilfs2]\n  nilfs_mount+0x9b5/0x12b0 [nilfs2]\n  ...\n\nThis fixes the issue by adding and using a new helper function for getting\nblock size with sanity check."
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      ],
      "title": "nilfs2: fix shift-out-of-bounds due to too large exponent of block size",
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    "datePublished": "2025-12-30T12:15:36.489Z",
    "dateReserved": "2025-12-30T12:06:07.135Z",
    "dateUpdated": "2026-05-11T19:26:35.896Z",
    "state": "PUBLISHED"
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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:23:58+00:00",
      "cve": "CVE-2022-50864",
      "id": "CVE-2022-50864",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
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      "title": "kernel: nilfs2: fix shift-out-of-bounds due to too large exponent of block size",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50864.json",
      "version": "3"
    },
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      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-29T02:18:13Z",
      "cve": "CVE-2022-50864",
      "id": "CVE-2022-50864",
      "initial_release_date": "2025-12-31T00:30:59Z",
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      "product_status:recommended": "196",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50864",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50864.json",
      "version": "26"
    }
  }
}



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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.