CVE-2026-23043 (GCVE-0-2026-23043)

Vulnerability from cvelistv5 – Published: 2026-02-04 16:00 – Updated: 2026-05-11 21:58
VLAI
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().
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2753e49176240f21e4bb10e03514f99e732704bb , < 6d1b61b8e1e44888c643d89225ab819b10649b2e (git)
Affected: 2753e49176240f21e4bb10e03514f99e732704bb , < 530e3d4af566ca44807d79359b90794dea24c4f3 (git)
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Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.6 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/tree-log.c"
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                  "vulnerable": true
                },
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                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "6.18",
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              "operator": "OR"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix NULL pointer dereference in do_abort_log_replay()\n\nCoverity reported a NULL pointer dereference issue (CID 1666756) in\ndo_abort_log_replay(). When btrfs_alloc_path() fails in\nreplay_one_buffer(), wc-\u003esubvol_path is NULL, but btrfs_abort_log_replay()\ncalls do_abort_log_replay() which unconditionally dereferences\nwc-\u003esubvol_path when attempting to print debug information. Fix this by\nadding a NULL check before dereferencing wc-\u003esubvol_path in\ndo_abort_log_replay()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:58:53.815Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6d1b61b8e1e44888c643d89225ab819b10649b2e"
        },
        {
          "url": "https://git.kernel.org/stable/c/530e3d4af566ca44807d79359b90794dea24c4f3"
        }
      ],
      "title": "btrfs: fix NULL pointer dereference in do_abort_log_replay()",
      "x_generator": {
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23043",
    "datePublished": "2026-02-04T16:00:26.353Z",
    "dateReserved": "2026-01-13T15:37:45.944Z",
    "dateUpdated": "2026-05-11T21:58:53.815Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-23043",
      "date": "2026-10-01",
      "epss": "0.00154",
      "percentile": "0.03858"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "fs/btrfs/tree-log.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
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                    "versionType": "git"
                  },
                  {
                    "lessThan": "530e3d4af566ca44807d79359b90794dea24c4f3",
                    "status": "affected",
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                    "versionType": "git"
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              },
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                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "6.18"
                  },
                  {
                    "lessThan": "6.18",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
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                    "versionType": "semver"
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          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix NULL pointer dereference in do_abort_log_replay()\n\nCoverity reported a NULL pointer dereference issue (CID 1666756) in\ndo_abort_log_replay(). When btrfs_alloc_path() fails in\nreplay_one_buffer(), wc-\u003esubvol_path is NULL, but btrfs_abort_log_replay()\ncalls do_abort_log_replay() which unconditionally dereferences\nwc-\u003esubvol_path when attempting to print debug information. Fix this by\nadding a NULL check before dereferencing wc-\u003esubvol_path in\ndo_abort_log_replay()."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbtrfs: corrige la desreferencia de puntero NULL en do_abort_log_replay()\n\nCoverity inform\u00f3 un problema de desreferencia de puntero NULL (CID 1666756) en do_abort_log_replay(). Cuando btrfs_alloc_path() falla en replay_one_buffer(), wc-\u0026gt;subvol_path es NULL, pero btrfs_abort_log_replay() llama a do_abort_log_replay() que desreferencia incondicionalmente wc-\u0026gt;subvol_path al intentar imprimir informaci\u00f3n de depuraci\u00f3n. Esto se corrige a\u00f1adiendo una comprobaci\u00f3n de NULL antes de desreferenciar wc-\u0026gt;subvol_path en do_abort_log_replay()."
          }
        ],
        "id": "CVE-2026-23043",
        "lastModified": "2026-06-17T10:20:45.820",
        "metrics": {},
        "published": "2026-02-04T16:16:19.793",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/530e3d4af566ca44807d79359b90794dea24c4f3"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/6d1b61b8e1e44888c643d89225ab819b10649b2e"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-28T11:01:01+00:00",
      "cve": "CVE-2026-23043",
      "id": "CVE-2026-23043",
      "initial_release_date": "2026-02-04T00:00:00+00:00",
      "product_status:known_affected": "14",
      "product_status:known_not_affected": "260",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: btrfs: fix NULL pointer dereference in do_abort_log_replay()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23043.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-05-13T03:46:41Z",
      "cve": "CVE-2026-23043",
      "id": "CVE-2026-23043",
      "initial_release_date": "2026-02-05T00:25:55Z",
      "product_status:known_not_affected": "257",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-23043",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-23043.json",
      "version": "7"
    }
  }
}



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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.

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