btrfs: fix chunk map leak in btrfs_map_block() after btrfs_chunk_map_num_copies()

{
  "id": "af60f9fadb5366660c191f6b069a5862176a3b6eb3a61e61c05f67fab131a858",
  "url": "https://osv.dev/vulnerability/CVE-2026-43393",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "btrfs: fix chunk map leak in btrfs_map_block() after btrfs_chunk_map_num_copies()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: btrfs: fix chunk map leak in btrfs_map_block() after btrfs_chunk_map_num_copies() Fix a chunk map leak in btrfs_map_block(): if we return early with -EINVAL, we're not freeing the chunk map that we've just looked up.",
    "evidence": "osv:CVE-2026-43393",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.78",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.19",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.19.9",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-43393",
      "aliases": [
        "CVE-2026-43393"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0ae653fbec2b9fbc72c65a0c99528990bfb2136d"
                },
                {
                  "fixed": "0e4aaf5a3212b6a469c2489637c29a8e2a5062a5"
                },
                {
                  "fixed": "7bdf00ed75c477252578068dba19934cd825f20a"
                },
                {
                  "fixed": "4f90c5c2698383984102401b1724b0b67da832ab"
                },
                {
                  "fixed": "f15fb3d41543244d1179f423da4a4832a55bc050"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43393.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.12.0"
                },
                {
                  "fixed": "6.12.78"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.19"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "6.19.9"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43393.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:39.516359946Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0e4aaf5a3212b6a469c2489637c29a8e2a5062a5",
        "https://git.kernel.org/stable/c/4f90c5c2698383984102401b1724b0b67da832ab",
        "https://git.kernel.org/stable/c/7bdf00ed75c477252578068dba19934cd825f20a",
        "https://git.kernel.org/stable/c/f15fb3d41543244d1179f423da4a4832a55bc050",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43393.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-43393",
        "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/2026/43xxx/CVE-2026-43393.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-43393",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 506906,
  "published_at": "2026-05-08T14:21:37.368+00:00"
}