CVE-2026-68422
btrfs: fix root leak if its reloc root is unexpected in merge_reloc_roots()
Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix root leak if its reloc root is unexpected in merge_reloc_roots() If we have an unexpected reloc_root for our root, we jump to the out label but never drop the reference we obtained for root, resulting in a leak. Add a missing btrfs_put_root() call.
INFO
Published Date :
Aug. 10, 2026, 1:20 p.m.
Last Modified :
Aug. 10, 2026, 1:20 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-68422
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update the Linux kernel.
- Ensure btrfs module is updated.
- Reboot the system if required.
- Verify the fix is applied.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-68422.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68422 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-68422
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-68422 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68422 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 10, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '24213fa46c7080c31d79aa2e3e2f0d9480cab700', 'lessThan': 'b3d39b03799600c76c33486e2d29b73a771023db', 'versionType': 'git'}, {'status': 'affected', 'version': '24213fa46c7080c31d79aa2e3e2f0d9480cab700', 'lessThan': '72f673d1c1deb819554d3e7e154f6d84301eb735', 'versionType': 'git'}, {'status': 'affected', 'version': '24213fa46c7080c31d79aa2e3e2f0d9480cab700', 'lessThan': '60a23d4ea169e27403f3bb023bb98036797c0206', 'versionType': 'git'}, {'status': 'affected', 'version': '24213fa46c7080c31d79aa2e3e2f0d9480cab700', 'lessThan': '7591d1727067d6063247901ad25c4bdc4e5695c4', 'versionType': 'git'}, {'status': 'affected', 'version': '24213fa46c7080c31d79aa2e3e2f0d9480cab700', 'lessThan': 'ce6050bafb4e33377dc17fcc357736bfc351180c', 'versionType': 'git'}], 'programFiles': ['fs/btrfs/relocation.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc4', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/btrfs/relocation.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: btrfs: fix root leak if its reloc root is unexpected in merge_reloc_roots() If we have an unexpected reloc_root for our root, we jump to the out label but never drop the reference we obtained for root, resulting in a leak. Add a missing btrfs_put_root() call. Added Reference https://git.kernel.org/stable/c/60a23d4ea169e27403f3bb023bb98036797c0206 Added Reference https://git.kernel.org/stable/c/72f673d1c1deb819554d3e7e154f6d84301eb735 Added Reference https://git.kernel.org/stable/c/7591d1727067d6063247901ad25c4bdc4e5695c4 Added Reference https://git.kernel.org/stable/c/b3d39b03799600c76c33486e2d29b73a771023db Added Reference https://git.kernel.org/stable/c/ce6050bafb4e33377dc17fcc357736bfc351180c