CVE-2026-46164 (GCVE-0-2026-46164)
Vulnerability from cvelistv5
Published
2026-05-28 09:36
Modified
2026-06-14 17:59
Severity ?
7.0 (High) - CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix double free in create_space_info_sub_group() error path When kobject_init_and_add() fails, the call chain is: create_space_info_sub_group() -> btrfs_sysfs_add_space_info_type() -> kobject_init_and_add() -> failure -> kobject_put(&sub_group->kobj) -> space_info_release() -> kfree(sub_group) Then control returns to create_space_info_sub_group(), where: btrfs_sysfs_add_space_info_type() returns error -> kfree(sub_group) Thus, sub_group is freed twice. Keep parent->sub_group[index] = NULL for the failure path, but after btrfs_sysfs_add_space_info_type() has called kobject_put(), let the kobject release callback handle the cleanup.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0bd151ce4200ca847990e05cca29a76456982ca5
Version: 190d5a7c4fe42b8c9aa46e3336389e7cb10395bb
Version: f92ee31e031c7819126d2febdda0c3e91f5d2eb9
Version: f92ee31e031c7819126d2febdda0c3e91f5d2eb9
Version: f92ee31e031c7819126d2febdda0c3e91f5d2eb9
Version: 64c7ddda83acfbaa0efb381a1928ce908c584607
Version: 6.6.122   ≤
Version: 6.12.67   ≤
Version: 6.1.162   ≤
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix double free in create_space_info_sub_group() error path\n\nWhen kobject_init_and_add() fails, the call chain is:\n\ncreate_space_info_sub_group()\n-\u003e btrfs_sysfs_add_space_info_type()\n-\u003e kobject_init_and_add()\n-\u003e failure\n-\u003e kobject_put(\u0026sub_group-\u003ekobj)\n-\u003e space_info_release()\n-\u003e kfree(sub_group)\n\nThen control returns to create_space_info_sub_group(), where:\n\nbtrfs_sysfs_add_space_info_type() returns error\n-\u003e kfree(sub_group)\n\nThus, sub_group is freed twice.\n\nKeep parent-\u003esub_group[index] = NULL for the failure path, but after\nbtrfs_sysfs_add_space_info_type() has called kobject_put(), let the\nkobject release callback handle the cleanup."
        }
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        "dateUpdated": "2026-06-14T17:59:24.631Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        {
          "url": "https://git.kernel.org/stable/c/a7449edf96143f192606ec8647e3167e1ecbd728"
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    "cveId": "CVE-2026-46164",
    "datePublished": "2026-05-28T09:36:19.810Z",
    "dateReserved": "2026-05-13T15:03:33.102Z",
    "dateUpdated": "2026-06-14T17:59:24.631Z",
    "state": "PUBLISHED"
  },
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}


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