ghsa-m562-wccv-64rv
Vulnerability from github
Published
2025-04-14 21:32
Modified
2025-04-14 21:32
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

scsi: sd: Fix potential NULL pointer dereference

If sd_probe() sees an early error before sdkp->device is initialized, sd_zbc_release_disk() is called. This causes a NULL pointer dereference when sd_is_zoned() is called inside that function. Avoid this by removing the call to sd_zbc_release_disk() in sd_probe() error path.

This change is safe and does not result in zone information memory leakage because the zone information for a zoned disk is allocated only when sd_revalidate_disk() is called, at which point sdkp->disk_dev is fully set, resulting in sd_disk_release() being called when needed to cleanup a disk zone information using sd_zbc_release_disk().

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49376"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:01:14Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: sd: Fix potential NULL pointer dereference\n\nIf sd_probe() sees an early error before sdkp-\u003edevice is initialized,\nsd_zbc_release_disk() is called. This causes a NULL pointer dereference\nwhen sd_is_zoned() is called inside that function. Avoid this by removing\nthe call to sd_zbc_release_disk() in sd_probe() error path.\n\nThis change is safe and does not result in zone information memory leakage\nbecause the zone information for a zoned disk is allocated only when\nsd_revalidate_disk() is called, at which point sdkp-\u003edisk_dev is fully set,\nresulting in sd_disk_release() being called when needed to cleanup a disk\nzone information using sd_zbc_release_disk().",
  "id": "GHSA-m562-wccv-64rv",
  "modified": "2025-04-14T21:32:23Z",
  "published": "2025-04-14T21:32:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49376"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/05fbde3a77a4f1d62e4c4428f384288c1f1a0be5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0fcb0b131cc90c8f523a293d84c58d0c7273c96f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3733439593ad12f7b54ae35c273ea6f15d692de3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/78f8e96df06e2d04d82d4071c299b59d28744f47"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c1f0187025905e9981000d44a92e159468b561a8"
    }
  ],
  "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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