bcachefs: Fix sb_field_downgrade validation

{
  "id": "03fd6ddf3619793e6e3caa0a87308c791ec952c82dce41ab6706814cb4a83ded",
  "url": "https://osv.dev/vulnerability/CVE-2024-41086",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "bcachefs: Fix sb_field_downgrade validation",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: bcachefs: Fix sb_field_downgrade validation - bch2_sb_downgrade_validate() wasn't checking for a downgrade entry extending past the end of the superblock section - for_each_downgrade_entry() is used in to_text() and needs to work on malformed input; it also was missing a check for a field extending past the end of the section",
    "evidence": "osv:CVE-2024-41086",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.9.8",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2024-41086",
      "aliases": [
        "CVE-2024-41086"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "84f1638795da1ff2084597de4251e9054f1ad728"
                },
                {
                  "fixed": "bf920ed92ef24dcd6970c88881cd4700b3acf05b"
                },
                {
                  "fixed": "692aa7a54b2b28d59f24b3bf8250837805484b99"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-41086.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.9.8"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-41086.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:39.638195995Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/692aa7a54b2b28d59f24b3bf8250837805484b99",
        "https://git.kernel.org/stable/c/bf920ed92ef24dcd6970c88881cd4700b3acf05b",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/41xxx/CVE-2024-41086.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-41086",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/41xxx/CVE-2024-41086.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-41086",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 506959,
  "published_at": "2024-07-29T15:48:02.175+00:00"
}