HighFix available
btrfs: fix double free in create_space_info() error path
Type: advisorySources: OSV
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.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 6.1.175, 6.12.88, 6.18.30, 6.6.140, 7.0.7
- CVEs
- CVE-2026-46129
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 8 Nov 2026, 00:48 UTC · Revision 1
Source evidence
btrfs: fix double free in create_space_info() error path
core-osv · Original sourcePublished 28 May 2026, 09:35 UTC
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.
osv:CVE-2026-46129
Kernel
Fixed versions: 6.1.175, 6.6.140, 6.12.88, 6.18.30, 7.0.7
Complete source record
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"modified": "2026-10-28T02:30:52.700087808Z",
"provider": "osv",
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