CVE-2022-50567 (GCVE-0-2022-50567)

Vulnerability from cvelistv5 – Published: 2025-10-22 13:23 – Updated: 2026-08-05 08:59
VLAI
Title
fs: jfs: fix shift-out-of-bounds in dbAllocAG
Summary
In the Linux kernel, the following vulnerability has been resolved: fs: jfs: fix shift-out-of-bounds in dbAllocAG Syzbot found a crash : UBSAN: shift-out-of-bounds in dbAllocAG. The underlying bug is the missing check of bmp->db_agl2size. The field can be greater than 64 and trigger the shift-out-of-bounds. Fix this bug by adding a check of bmp->db_agl2size in dbMount since this field is used in many following functions. The upper bound for this field is L2MAXL2SIZE - L2MAXAG, thanks for the help of Dave Kleikamp. Note that, for maintenance, I reorganized error handling code of dbMount.
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 CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d3b486946a4e62c7ef6023f7d9c1d049051384ba (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3115313cf03113e87c87adee18ee49a20bbdb9ba (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < eea87acb6027be3dd4d3c57186bb22800d57fdda (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 359616ce587e524107730504891afa4b1a8be58c (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3e997e4ce8ae7ab89d72334120f6aee49c5bbdbd (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0536f76a2bca83d1a3740517ba22cc93a44b3099 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2c575c8905f7a8b32d5611b91856b69bac2a5bf1 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 67973caae78e21ee46a7281aaa8ca364eb9c444f (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 898f706695682b9954f280d95e49fa86ffa55d08 (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 4.9.337 , ≤ 4.9.* (semver)
Unaffected: 4.14.303 , ≤ 4.14.* (semver)
Unaffected: 4.19.270 , ≤ 4.19.* (semver)
Unaffected: 5.4.229 , ≤ 5.4.* (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)
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs: jfs: fix shift-out-of-bounds in dbAllocAG\n\nSyzbot found a crash : UBSAN: shift-out-of-bounds in dbAllocAG. The\nunderlying bug is the missing check of bmp-\u003edb_agl2size. The field can\nbe greater than 64 and trigger the shift-out-of-bounds.\n\nFix this bug by adding a check of bmp-\u003edb_agl2size in dbMount since this\nfield is used in many following functions. The upper bound for this\nfield is L2MAXL2SIZE - L2MAXAG, thanks for the help of Dave Kleikamp.\nNote that, for maintenance, I reorganized error handling code of dbMount."
          }
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        "lastModified": "2026-08-04T10:18:19.500",
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                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
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        "published": "2025-10-22T14:15:41.533",
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          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/3e997e4ce8ae7ab89d72334120f6aee49c5bbdbd"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/67973caae78e21ee46a7281aaa8ca364eb9c444f"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/898f706695682b9954f280d95e49fa86ffa55d08"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/d3b486946a4e62c7ef6023f7d9c1d049051384ba"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/eea87acb6027be3dd4d3c57186bb22800d57fdda"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T19:38:23+00:00",
      "cve": "CVE-2022-50567",
      "id": "CVE-2022-50567",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "14",
      "product_status:known_not_affected": "260",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: fs: jfs: fix shift-out-of-bounds in dbAllocAG",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50567.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T02:26:37Z",
      "cve": "CVE-2022-50567",
      "id": "CVE-2022-50567",
      "initial_release_date": "2025-10-23T00:10:53Z",
      "product_status:known_affected": "435",
      "product_status:known_not_affected": "305",
      "product_status:recommended": "196",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50567",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50567.json",
      "version": "29"
    }
  }
}



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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

Author Source Type Date Other

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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.