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GHSA-79JF-89PH-WP26

Vulnerability from github – Published: 2026-02-04 18:30 – Updated: 2026-02-04 18:30

Details

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().

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23043"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-04T16:16:19Z",
    "severity": null
  },
  "details": "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().",
  "id": "GHSA-79jf-89ph-wp26",
  "modified": "2026-02-04T18:30:41Z",
  "published": "2026-02-04T18:30:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23043"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/530e3d4af566ca44807d79359b90794dea24c4f3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6d1b61b8e1e44888c643d89225ab819b10649b2e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2026-02-04 16:00 – Updated: 2026-05-11 21:58

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

Linux mitre root Scorecard

References

2 references

URL	Tags
https://git.kernel.org/stable/c/6d1b61b8e1e44888c…
https://git.kernel.org/stable/c/530e3d4af566ca448…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 2753e49176240f21e4bb10e03514f99e732704bb , < 6d1b61b8e1e44888c643d89225ab819b10649b2e (git) Affected: 2753e49176240f21e4bb10e03514f99e732704bb , < 530e3d4af566ca44807d79359b90794dea24c4f3 (git)
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"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6d1b61b8e1e44888c643d89225ab819b10649b2e",
              "status": "affected",
              "version": "2753e49176240f21e4bb10e03514f99e732704bb",
              "versionType": "git"
            },
            {
              "lessThan": "530e3d4af566ca44807d79359b90794dea24c4f3",
              "status": "affected",
              "version": "2753e49176240f21e4bb10e03514f99e732704bb",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/tree-log.c"
          ],
          "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"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.6",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                }
              ],
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              "operator": "OR"
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        }
      ],
      "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()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:58:53.815Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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          "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": {
        "engine": "bippy-1.2.0"
      }
    }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "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"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-79JF-89PH-WP26

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

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