CVE-2026-46164In 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_spa…
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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.
- CVSS
- 7.0 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-415
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Jun 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
linux linux_kernel linux:linux_kernel | from 6.1.162 before 6.2; from 6.6.122 before 6.6.141; from 6.12.67 before 6.12.90; from 6.16 before 6.18.32; from 6.19 before 7.0.7 | NVD |
References
- https://git.kernel.org/stable/c/14b22be1dd844383eb03af9b1ee3b6b25d32aeafpatch
- https://git.kernel.org/stable/c/259af6857a1b4f1e9ef8b780353f9d11c26a22bdpatch
- https://git.kernel.org/stable/c/a7449edf96143f192606ec8647e3167e1ecbd728patch
- https://git.kernel.org/stable/c/c2d59527cba6d59f0d77a75c1101ab4e69758bea
- https://git.kernel.org/stable/c/d2a675f2e238ec96c8e91e2718c1f910c9c8fb21patch
- https://git.kernel.org/stable/c/dfd05a16b5c9d1d98b47905f37f2fccda52173d1patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.