btrfs: fix NULL pointer dereference in do_abort_log_replay()

{
  "id": "1bc253759ee139abfac175e8f4f38ccfc3c6dbc0f955b6f32da6b43281a1267a",
  "url": "https://osv.dev/vulnerability/CVE-2026-23043",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "btrfs: fix NULL pointer dereference in do_abort_log_replay()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: btrfs: fix NULL pointer dereference in do_abort_log_replay() Coverity reported a NULL pointer dereference issue (CID 1666756) in do_abort_log_replay(). When btrfs_alloc_path() fails in replay_one_buffer(), wc->subvol_path is NULL, but btrfs_abort_log_replay() calls do_abort_log_replay() which unconditionally dereferences wc->subvol_path when attempting to print debug information. Fix this by adding a NULL check before dereferencing wc->subvol_path in do_abort_log_replay().",
    "evidence": "osv:CVE-2026-23043",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-23043",
      "aliases": [
        "CVE-2026-23043"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2753e49176240f21e4bb10e03514f99e732704bb"
                },
                {
                  "fixed": "6d1b61b8e1e44888c643d89225ab819b10649b2e"
                },
                {
                  "fixed": "530e3d4af566ca44807d79359b90794dea24c4f3"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23043.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.18.0"
                },
                {
                  "fixed": "6.18.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23043.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:27.263003007Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/530e3d4af566ca44807d79359b90794dea24c4f3",
        "https://git.kernel.org/stable/c/6d1b61b8e1e44888c643d89225ab819b10649b2e",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23043.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-23043",
        "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/2026/23xxx/CVE-2026-23043.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-23043",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 493972,
  "published_at": "2026-02-04T16:00:26.353+00:00"
}