GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2022-49428 (GCVE-0-2022-49428)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:12 – Updated: 2026-05-11 18:59
VLAI
Title
f2fs: fix to do sanity check on inline_dots inode
Summary
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on inline_dots inode As Wenqing reported in bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=215765 It will cause a kernel panic with steps: - mkdir mnt - mount tmp40.img mnt - ls mnt folio_mark_dirty+0x33/0x50 f2fs_add_regular_entry+0x541/0xad0 [f2fs] f2fs_add_dentry+0x6c/0xb0 [f2fs] f2fs_do_add_link+0x182/0x230 [f2fs] __recover_dot_dentries+0x2d6/0x470 [f2fs] f2fs_lookup+0x5af/0x6a0 [f2fs] __lookup_slow+0xac/0x200 lookup_slow+0x45/0x70 walk_component+0x16c/0x250 path_lookupat+0x8b/0x1f0 filename_lookup+0xef/0x250 user_path_at_empty+0x46/0x70 vfs_statx+0x98/0x190 __do_sys_newlstat+0x41/0x90 __x64_sys_newlstat+0x1a/0x30 do_syscall_64+0x37/0xb0 entry_SYSCALL_64_after_hwframe+0x44/0xae The root cause is for special file: e.g. character, block, fifo or socket file, f2fs doesn't assign address space operations pointer array for mapping->a_ops field, so, in a fuzzed image, if inline_dots flag was tagged in special file, during lookup(), when f2fs runs into __recover_dot_dentries(), it will cause NULL pointer access once f2fs_add_regular_entry() calls a_ops->set_dirty_page().
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 510022a85839a8409d1e6a519bb86ce71a84f30a , < 250e5a6be52a6b9d82fe91976c83cc158868b4e9 (git)
Affected: 510022a85839a8409d1e6a519bb86ce71a84f30a , < 34f48ce5d5936eea33e3b6415403e57eb84aff97 (git)
Affected: 510022a85839a8409d1e6a519bb86ce71a84f30a , < 2f46160d0a19b13bfe96c0dd50eed5c5d253ab7a (git)
Affected: 510022a85839a8409d1e6a519bb86ce71a84f30a , < 12662d19467b391b5b509ac5e9ab4f583c6dde16 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.1
Unaffected: 0 , < 4.1 (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)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/f2fs/namei.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "250e5a6be52a6b9d82fe91976c83cc158868b4e9",
              "status": "affected",
              "version": "510022a85839a8409d1e6a519bb86ce71a84f30a",
              "versionType": "git"
            },
            {
              "lessThan": "34f48ce5d5936eea33e3b6415403e57eb84aff97",
              "status": "affected",
              "version": "510022a85839a8409d1e6a519bb86ce71a84f30a",
              "versionType": "git"
            },
            {
              "lessThan": "2f46160d0a19b13bfe96c0dd50eed5c5d253ab7a",
              "status": "affected",
              "version": "510022a85839a8409d1e6a519bb86ce71a84f30a",
              "versionType": "git"
            },
            {
              "lessThan": "12662d19467b391b5b509ac5e9ab4f583c6dde16",
              "status": "affected",
              "version": "510022a85839a8409d1e6a519bb86ce71a84f30a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/f2fs/namei.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.1"
            },
            {
              "lessThan": "4.1",
              "status": "unaffected",
              "version": "0",
              "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": "5.15.46",
                  "versionStartIncluding": "4.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.17.14",
                  "versionStartIncluding": "4.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18.3",
                  "versionStartIncluding": "4.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19",
                  "versionStartIncluding": "4.1",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to do sanity check on inline_dots inode\n\nAs Wenqing reported in bugzilla:\n\nhttps://bugzilla.kernel.org/show_bug.cgi?id=215765\n\nIt will cause a kernel panic with steps:\n- mkdir mnt\n- mount tmp40.img mnt\n- ls mnt\n\nfolio_mark_dirty+0x33/0x50\nf2fs_add_regular_entry+0x541/0xad0 [f2fs]\nf2fs_add_dentry+0x6c/0xb0 [f2fs]\nf2fs_do_add_link+0x182/0x230 [f2fs]\n__recover_dot_dentries+0x2d6/0x470 [f2fs]\nf2fs_lookup+0x5af/0x6a0 [f2fs]\n__lookup_slow+0xac/0x200\nlookup_slow+0x45/0x70\nwalk_component+0x16c/0x250\npath_lookupat+0x8b/0x1f0\nfilename_lookup+0xef/0x250\nuser_path_at_empty+0x46/0x70\nvfs_statx+0x98/0x190\n__do_sys_newlstat+0x41/0x90\n__x64_sys_newlstat+0x1a/0x30\ndo_syscall_64+0x37/0xb0\nentry_SYSCALL_64_after_hwframe+0x44/0xae\n\nThe root cause is for special file: e.g. character, block, fifo or\nsocket file, f2fs doesn\u0027t assign address space operations pointer array\nfor mapping-\u003ea_ops field, so, in a fuzzed image, if inline_dots flag was\ntagged in special file, during lookup(), when f2fs runs into\n__recover_dot_dentries(), it will cause NULL pointer access once\nf2fs_add_regular_entry() calls a_ops-\u003eset_dirty_page()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T18:59:37.737Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/250e5a6be52a6b9d82fe91976c83cc158868b4e9"
        },
        {
          "url": "https://git.kernel.org/stable/c/34f48ce5d5936eea33e3b6415403e57eb84aff97"
        },
        {
          "url": "https://git.kernel.org/stable/c/2f46160d0a19b13bfe96c0dd50eed5c5d253ab7a"
        },
        {
          "url": "https://git.kernel.org/stable/c/12662d19467b391b5b509ac5e9ab4f583c6dde16"
        }
      ],
      "title": "f2fs: fix to do sanity check on inline_dots inode",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49428",
    "datePublished": "2025-02-26T02:12:48.149Z",
    "dateReserved": "2025-02-26T02:08:31.569Z",
    "dateUpdated": "2026-05-11T18:59:37.737Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2022-49428",
      "date": "2026-09-17",
      "epss": "0.00256",
      "percentile": "0.17489"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49428\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-26T07:01:19.290\",\"lastModified\":\"2026-06-17T05:18:01.470\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nf2fs: fix to do sanity check on inline_dots inode\\n\\nAs Wenqing reported in bugzilla:\\n\\nhttps://bugzilla.kernel.org/show_bug.cgi?id=215765\\n\\nIt will cause a kernel panic with steps:\\n- mkdir mnt\\n- mount tmp40.img mnt\\n- ls mnt\\n\\nfolio_mark_dirty+0x33/0x50\\nf2fs_add_regular_entry+0x541/0xad0 [f2fs]\\nf2fs_add_dentry+0x6c/0xb0 [f2fs]\\nf2fs_do_add_link+0x182/0x230 [f2fs]\\n__recover_dot_dentries+0x2d6/0x470 [f2fs]\\nf2fs_lookup+0x5af/0x6a0 [f2fs]\\n__lookup_slow+0xac/0x200\\nlookup_slow+0x45/0x70\\nwalk_component+0x16c/0x250\\npath_lookupat+0x8b/0x1f0\\nfilename_lookup+0xef/0x250\\nuser_path_at_empty+0x46/0x70\\nvfs_statx+0x98/0x190\\n__do_sys_newlstat+0x41/0x90\\n__x64_sys_newlstat+0x1a/0x30\\ndo_syscall_64+0x37/0xb0\\nentry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\nThe root cause is for special file: e.g. character, block, fifo or\\nsocket file, f2fs doesn\u0027t assign address space operations pointer array\\nfor mapping-\u003ea_ops field, so, in a fuzzed image, if inline_dots flag was\\ntagged in special file, during lookup(), when f2fs runs into\\n__recover_dot_dentries(), it will cause NULL pointer access once\\nf2fs_add_regular_entry() calls a_ops-\u003eset_dirty_page().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: f2fs: correcci\u00f3n para realizar una comprobaci\u00f3n de cordura en el inodo inline_dots Como inform\u00f3 Wenqing en bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=215765 Provocar\u00e1 un p\u00e1nico del kernel con los pasos: - mkdir mnt - mount tmp40.img mnt - ls mnt folio_mark_dirty+0x33/0x50 f2fs_add_regular_entry+0x541/0xad0 [f2fs] f2fs_add_dentry+0x6c/0xb0 [f2fs] f2fs_do_add_link+0x182/0x230 [f2fs] __recover_dot_dentries+0x2d6/0x470 [f2fs] f2fs_lookup+0x5af/0x6a0 [f2fs] __lookup_slow+0xac/0x200 lookup_slow+0x45/0x70 walk_component+0x16c/0x250 path_lookupat+0x8b/0x1f0 filename_lookup+0xef/0x250 user_path_at_empty+0x46/0x70 vfs_statx+0x98/0x190 __do_sys_newlstat+0x41/0x90 __x64_sys_newlstat+0x1a/0x30 do_syscall_64+0x37/0xb0 entry_SYSCALL_64_after_hwframe+0x44/0xae La causa ra\u00edz es un archivo especial: por ejemplo, un archivo de caracteres, bloques, FIFO o socket. f2fs no asigna una matriz de punteros de operaciones de espacio de direcciones para el campo mapping-\u0026gt;a_ops, por lo que, en una imagen difusa, si el indicador inline_dots fue etiquetado en un archivo especial, durante lookup(), cuando f2fs se ejecuta en __recover_dot_dentries(), provocar\u00e1 un acceso al puntero NULL una vez que f2fs_add_regular_entry() llame a a_ops-\u0026gt;set_dirty_page().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/f2fs/namei.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"510022a85839a8409d1e6a519bb86ce71a84f30a\",\"lessThan\":\"250e5a6be52a6b9d82fe91976c83cc158868b4e9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"510022a85839a8409d1e6a519bb86ce71a84f30a\",\"lessThan\":\"34f48ce5d5936eea33e3b6415403e57eb84aff97\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"510022a85839a8409d1e6a519bb86ce71a84f30a\",\"lessThan\":\"2f46160d0a19b13bfe96c0dd50eed5c5d253ab7a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"510022a85839a8409d1e6a519bb86ce71a84f30a\",\"lessThan\":\"12662d19467b391b5b509ac5e9ab4f583c6dde16\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/f2fs/namei.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.1\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.1\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.46\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.17.14\",\"lessThanOrEqual\":\"5.17.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.18.3\",\"lessThanOrEqual\":\"5.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.19\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"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\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.1\",\"versionEndExcluding\":\"5.15.46\",\"matchCriteriaId\":\"90E4FF6F-AB0A-4194-BCDB-8284121892A2\"},{\"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/12662d19467b391b5b509ac5e9ab4f583c6dde16\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/250e5a6be52a6b9d82fe91976c83cc158868b4e9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2f46160d0a19b13bfe96c0dd50eed5c5d253ab7a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/34f48ce5d5936eea33e3b6415403e57eb84aff97\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:06:53+00:00",
      "cve": "CVE-2022-49428",
      "id": "CVE-2022-49428",
      "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: f2fs: fix to do sanity check on inline_dots inode",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49428.json",
      "version": "3"
    }
  }
}



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.


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.