GHSA-7WPH-5WJX-7RGV

Vulnerability from github – Published: 2024-07-29 18:30 – Updated: 2026-07-14 15:31
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

gfs2: Fix NULL pointer dereference in gfs2_log_flush

In gfs2_jindex_free(), set sdp->sd_jdesc to NULL under the log flush lock to provide exclusion against gfs2_log_flush().

In gfs2_log_flush(), check if sdp->sd_jdesc is non-NULL before dereferencing it. Otherwise, we could run into a NULL pointer dereference when outstanding glock work races with an unmount (glock_work_func -> run_queue -> do_xmote -> inode_go_sync -> gfs2_log_flush).

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2024-42079"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-29T16:15:07Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ngfs2: Fix NULL pointer dereference in gfs2_log_flush\n\nIn gfs2_jindex_free(), set sdp-\u003esd_jdesc to NULL under the log flush\nlock to provide exclusion against gfs2_log_flush().\n\nIn gfs2_log_flush(), check if sdp-\u003esd_jdesc is non-NULL before\ndereferencing it.  Otherwise, we could run into a NULL pointer\ndereference when outstanding glock work races with an unmount\n(glock_work_func -\u003e run_queue -\u003e do_xmote -\u003e inode_go_sync -\u003e\ngfs2_log_flush).",
  "id": "GHSA-7wph-5wjx-7rgv",
  "modified": "2026-07-14T15:31:15Z",
  "published": "2024-07-29T18:30:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-42079"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3429ef5f50909cee9e498c50f0c499b9397116ce"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/35264909e9d1973ab9aaa2a1b07cda70f12bb828"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5f6a84cfb33b34610623857bd93919dcb661e29b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c3c5cfa3170c0940bc66a142859caac07d19b9d6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f54f9d5368a4e92ede7dd078a62788dae3a7c6ef"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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