CVE-2026-46129 (GCVE-0-2026-46129)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:35 – Updated: 2026-06-14 17:56
VLAI
Title
btrfs: fix double free in create_space_info() error path
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix double free in create_space_info() error path When kobject_init_and_add() fails, the call chain is: create_space_info() -> btrfs_sysfs_add_space_info_type() -> kobject_init_and_add() -> failure -> kobject_put(&space_info->kobj) -> space_info_release() -> kfree(space_info) Then control returns to create_space_info(): btrfs_sysfs_add_space_info_type() returns error -> goto out_free -> kfree(space_info) This causes a double free. Keep the direct kfree(space_info) for the earlier failure path, but after btrfs_sysfs_add_space_info_type() has called kobject_put(), let the kobject release callback handle the cleanup.
Assigner
Impacted products
Vendor Product Version
Linux Linux Affected: 20e8f2de3688082eeafeb93c8900485b7542457e , < ae6d6e31ceb72b7697c28a528e4923c08e3c2ef5 (git)
Affected: 58208907c4044a764dbd8896026283905da6d9be , < c2670ec4aa49ca226bce9776601e0da37502be07 (git)
Affected: bb4fa4c0b54aae25e55faeda7f78d0c11b8cd618 , < f414b3abbba59ef379a2b3c31f2bdd9358ed5e53 (git)
Affected: 6cb008f1bb23e023dfe615cca5df14570dfc8da5 , < 9a060970fd7b5e1c561e4ce73cb9949e4269a738 (git)
Affected: a11224a016d6d1d46a4d9b6573244448a80d4d7f , < dd6ade0fdd59218d71a981ae7c937a304e49209c (git)
Affected: a11224a016d6d1d46a4d9b6573244448a80d4d7f , < 3f487be81292702a59ea9dbc4088b3360a50e837 (git)
Affected: 6.1.162 , < 6.1.175 (semver)
Affected: 6.6.122 , < 6.6.140 (semver)
Affected: 6.12.67 , < 6.12.88 (semver)
Affected: 6.18.7 , < 6.18.30 (semver)
Create a notification for this product.
Linux Linux Affected: 6.19
Unaffected: 0 , < 6.19 (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.140 , ≤ 6.6.* (semver)
Unaffected: 6.12.88 , ≤ 6.12.* (semver)
Unaffected: 6.18.30 , ≤ 6.18.* (semver)
Unaffected: 7.0.7 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix double free in create_space_info() error path\n\nWhen kobject_init_and_add() fails, the call chain is:\n\ncreate_space_info()\n-\u003e btrfs_sysfs_add_space_info_type()\n-\u003e kobject_init_and_add()\n-\u003e failure\n-\u003e kobject_put(\u0026space_info-\u003ekobj)\n-\u003e space_info_release()\n-\u003e kfree(space_info)\n\nThen control returns to create_space_info():\n\nbtrfs_sysfs_add_space_info_type() returns error\n-\u003e goto out_free\n-\u003e kfree(space_info)\n\nThis causes a double free.\n\nKeep the direct kfree(space_info) for the earlier failure path, but\nafter btrfs_sysfs_add_space_info_type() has called kobject_put(), let\nthe kobject release callback handle the cleanup."
        }
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      "title": "btrfs: fix double free in create_space_info() error path",
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      "version": "3"
    },
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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T07:40:59+00:00",
      "cve": "CVE-2026-46129",
      "id": "CVE-2026-46129",
      "initial_release_date": "2026-05-28T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: btrfs: fix double free in create_space_info() error path",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46129.json",
      "version": "3"
    }
  }
}



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