CVE-2022-49343 (GCVE-0-2022-49343)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:10 – Updated: 2026-05-11 18:57
VLAI
Title
ext4: avoid cycles in directory h-tree
Summary
In the Linux kernel, the following vulnerability has been resolved: ext4: avoid cycles in directory h-tree A maliciously corrupted filesystem can contain cycles in the h-tree stored inside a directory. That can easily lead to the kernel corrupting tree nodes that were already verified under its hands while doing a node split and consequently accessing unallocated memory. Fix the problem by verifying traversed block numbers are unique.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: ac27a0ec112a089f1a5102bc8dffc79c8c815571 , < 24b8206fec1db21d7e82f21f0b2ff5e5672cf5b3 (git)
Affected: ac27a0ec112a089f1a5102bc8dffc79c8c815571 , < b3ad9ff6f06c1dc6abf7437691c88ca3d6da3ac0 (git)
Affected: ac27a0ec112a089f1a5102bc8dffc79c8c815571 , < e157c8f87e8fac112d6c955e69a60cdb9bc80a60 (git)
Affected: ac27a0ec112a089f1a5102bc8dffc79c8c815571 , < ff4cafa51762da3824881a9000ca421d4b78b138 (git)
Affected: ac27a0ec112a089f1a5102bc8dffc79c8c815571 , < 3a3ce941645407cd0b0b7f01ad9e2ea3770f46cc (git)
Affected: ac27a0ec112a089f1a5102bc8dffc79c8c815571 , < d5a16a6df2c16eaf4de04948553ef0089dee463f (git)
Affected: ac27a0ec112a089f1a5102bc8dffc79c8c815571 , < 6084240bfc44bf265ab6ae7d96980469b05be0f1 (git)
Affected: ac27a0ec112a089f1a5102bc8dffc79c8c815571 , < 3ba733f879c2a88910744647e41edeefbc0d92b2 (git)
Create a notification for this product.
Linux Linux Affected: 2.6.19
Unaffected: 0 , < 2.6.19 (semver)
Unaffected: 4.14.283 , ≤ 4.14.* (semver)
Unaffected: 4.19.247 , ≤ 4.19.* (semver)
Unaffected: 5.4.198 , ≤ 5.4.* (semver)
Unaffected: 5.10.121 , ≤ 5.10.* (semver)
Unaffected: 5.15.46 , ≤ 5.15.* (semver)
Unaffected: 5.17.14 , ≤ 5.17.* (semver)
Unaffected: 5.18.3 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ext4/namei.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "24b8206fec1db21d7e82f21f0b2ff5e5672cf5b3",
              "status": "affected",
              "version": "ac27a0ec112a089f1a5102bc8dffc79c8c815571",
              "versionType": "git"
            },
            {
              "lessThan": "b3ad9ff6f06c1dc6abf7437691c88ca3d6da3ac0",
              "status": "affected",
              "version": "ac27a0ec112a089f1a5102bc8dffc79c8c815571",
              "versionType": "git"
            },
            {
              "lessThan": "e157c8f87e8fac112d6c955e69a60cdb9bc80a60",
              "status": "affected",
              "version": "ac27a0ec112a089f1a5102bc8dffc79c8c815571",
              "versionType": "git"
            },
            {
              "lessThan": "ff4cafa51762da3824881a9000ca421d4b78b138",
              "status": "affected",
              "version": "ac27a0ec112a089f1a5102bc8dffc79c8c815571",
              "versionType": "git"
            },
            {
              "lessThan": "3a3ce941645407cd0b0b7f01ad9e2ea3770f46cc",
              "status": "affected",
              "version": "ac27a0ec112a089f1a5102bc8dffc79c8c815571",
              "versionType": "git"
            },
            {
              "lessThan": "d5a16a6df2c16eaf4de04948553ef0089dee463f",
              "status": "affected",
              "version": "ac27a0ec112a089f1a5102bc8dffc79c8c815571",
              "versionType": "git"
            },
            {
              "lessThan": "6084240bfc44bf265ab6ae7d96980469b05be0f1",
              "status": "affected",
              "version": "ac27a0ec112a089f1a5102bc8dffc79c8c815571",
              "versionType": "git"
            },
            {
              "lessThan": "3ba733f879c2a88910744647e41edeefbc0d92b2",
              "status": "affected",
              "version": "ac27a0ec112a089f1a5102bc8dffc79c8c815571",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/ext4/namei.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.19"
            },
            {
              "lessThan": "2.6.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.283",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.247",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.198",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.121",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.17.*",
              "status": "unaffected",
              "version": "5.17.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.283",
                  "versionStartIncluding": "2.6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.247",
                  "versionStartIncluding": "2.6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.198",
                  "versionStartIncluding": "2.6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.121",
                  "versionStartIncluding": "2.6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.46",
                  "versionStartIncluding": "2.6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.17.14",
                  "versionStartIncluding": "2.6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18.3",
                  "versionStartIncluding": "2.6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19",
                  "versionStartIncluding": "2.6.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: avoid cycles in directory h-tree\n\nA maliciously corrupted filesystem can contain cycles in the h-tree\nstored inside a directory. That can easily lead to the kernel corrupting\ntree nodes that were already verified under its hands while doing a node\nsplit and consequently accessing unallocated memory. Fix the problem by\nverifying traversed block numbers are unique."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T18:57:51.919Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/24b8206fec1db21d7e82f21f0b2ff5e5672cf5b3"
        },
        {
          "url": "https://git.kernel.org/stable/c/b3ad9ff6f06c1dc6abf7437691c88ca3d6da3ac0"
        },
        {
          "url": "https://git.kernel.org/stable/c/e157c8f87e8fac112d6c955e69a60cdb9bc80a60"
        },
        {
          "url": "https://git.kernel.org/stable/c/ff4cafa51762da3824881a9000ca421d4b78b138"
        },
        {
          "url": "https://git.kernel.org/stable/c/3a3ce941645407cd0b0b7f01ad9e2ea3770f46cc"
        },
        {
          "url": "https://git.kernel.org/stable/c/d5a16a6df2c16eaf4de04948553ef0089dee463f"
        },
        {
          "url": "https://git.kernel.org/stable/c/6084240bfc44bf265ab6ae7d96980469b05be0f1"
        },
        {
          "url": "https://git.kernel.org/stable/c/3ba733f879c2a88910744647e41edeefbc0d92b2"
        }
      ],
      "title": "ext4: avoid cycles in directory h-tree",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49343",
    "datePublished": "2025-02-26T02:10:59.970Z",
    "dateReserved": "2025-02-26T02:08:31.542Z",
    "dateUpdated": "2026-05-11T18:57:51.919Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2022-49343",
      "date": "2026-05-27",
      "epss": "0.0001",
      "percentile": "0.01128"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49343\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-26T07:01:11.040\",\"lastModified\":\"2025-10-21T12:18:01.940\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\next4: avoid cycles in directory h-tree\\n\\nA maliciously corrupted filesystem can contain cycles in the h-tree\\nstored inside a directory. That can easily lead to the kernel corrupting\\ntree nodes that were already verified under its hands while doing a node\\nsplit and consequently accessing unallocated memory. Fix the problem by\\nverifying traversed block numbers are unique.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: evitar ciclos en el directorio h-tree Un sistema de archivos da\u00f1ado maliciosamente puede contener ciclos en el h-tree almacenados dentro de un directorio. Eso puede hacer que el kernel corrompa f\u00e1cilmente los nodos del \u00e1rbol que ya se hab\u00edan verificado bajo su control mientras realizaba una divisi\u00f3n de nodos y, en consecuencia, accediera a memoria no asignada. Solucione el problema verificando que los n\u00fameros de bloque recorridos sean \u00fanicos.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"4.14.283\",\"matchCriteriaId\":\"42074657-A7B6-4740-88B7-67B440018C1C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.15\",\"versionEndExcluding\":\"4.19.247\",\"matchCriteriaId\":\"B8CFA0F4-2D75-41F4-9753-87944A08B53B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.198\",\"matchCriteriaId\":\"3EC49633-14DE-4EBD-BB80-76AE2E3EABB9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.121\",\"matchCriteriaId\":\"34ACD872-E5BC-401C-93D5-B357A62426E0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.46\",\"matchCriteriaId\":\"20D41697-0E8B-4B7D-8842-F17BF2AA21E1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"5.17.14\",\"matchCriteriaId\":\"15E2DD33-2255-4B76-9C15-04FF8CBAB252\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.18\",\"versionEndExcluding\":\"5.18.3\",\"matchCriteriaId\":\"8E122216-2E9E-4B3E-B7B8-D575A45BA3C2\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/24b8206fec1db21d7e82f21f0b2ff5e5672cf5b3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3a3ce941645407cd0b0b7f01ad9e2ea3770f46cc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3ba733f879c2a88910744647e41edeefbc0d92b2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6084240bfc44bf265ab6ae7d96980469b05be0f1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b3ad9ff6f06c1dc6abf7437691c88ca3d6da3ac0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d5a16a6df2c16eaf4de04948553ef0089dee463f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e157c8f87e8fac112d6c955e69a60cdb9bc80a60\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ff4cafa51762da3824881a9000ca421d4b78b138\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.



Detection rules are retrieved from Rulezet.