CVE-2026-72373
afs: Fix missing NULL pointer check in afs_break_some_callbacks()
Description
In the Linux kernel, the following vulnerability has been resolved: afs: Fix missing NULL pointer check in afs_break_some_callbacks() Fix afs_break_some_callbacks() to check to see if afs_lookup_volume_rcu() returned NULL (e.g. the specified volume is unknown).
INFO
Published Date :
Aug. 15, 2026, 6:22 a.m.
Last Modified :
Aug. 17, 2026, 6:18 a.m.
Remotely Exploit :
Yes !
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Update the Linux kernel to the latest stable version.
- Apply the specific afs patch for this issue.
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-2026-72373.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-72373 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-2026-72373
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-2026-72373 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-72373 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.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '8230fd8217b7ea76f838ae88e4a5a8e54f37099f', 'lessThan': 'a99a617701186dc68c7b330d35fc2253f48e2ab2', 'versionType': 'git'}, {'status': 'affected', 'version': '8230fd8217b7ea76f838ae88e4a5a8e54f37099f', 'lessThan': '5492799ec5d27be3bd454dcaf046bc7054f637ae', 'versionType': 'git'}, {'status': 'affected', 'version': '8230fd8217b7ea76f838ae88e4a5a8e54f37099f', 'lessThan': 'e3e59ff22a0de01ed0cf3a3e25558811abc3b70a', 'versionType': 'git'}, {'status': 'affected', 'version': '8230fd8217b7ea76f838ae88e4a5a8e54f37099f', 'lessThan': '794a01110390c1b76f59ece773fb0fbfd89c6f5c', 'versionType': 'git'}], 'programFiles': ['fs/afs/callback.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/afs/callback.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '8230fd8217b7ea76f838ae88e4a5a8e54f37099f', 'lessThan': 'a99a617701186dc68c7b330d35fc2253f48e2ab2', 'versionType': 'git'}, {'status': 'affected', 'version': '8230fd8217b7ea76f838ae88e4a5a8e54f37099f', 'lessThan': '5492799ec5d27be3bd454dcaf046bc7054f637ae', 'versionType': 'git'}, {'status': 'affected', 'version': '8230fd8217b7ea76f838ae88e4a5a8e54f37099f', 'lessThan': 'e3e59ff22a0de01ed0cf3a3e25558811abc3b70a', 'versionType': 'git'}, {'status': 'affected', 'version': '8230fd8217b7ea76f838ae88e4a5a8e54f37099f', 'lessThan': '794a01110390c1b76f59ece773fb0fbfd89c6f5c', 'versionType': 'git'}], 'programFiles': ['fs/afs/callback.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/afs/callback.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 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': '8230fd8217b7ea76f838ae88e4a5a8e54f37099f', 'lessThan': 'a99a617701186dc68c7b330d35fc2253f48e2ab2', 'versionType': 'git'}, {'status': 'affected', 'version': '8230fd8217b7ea76f838ae88e4a5a8e54f37099f', 'lessThan': '5492799ec5d27be3bd454dcaf046bc7054f637ae', 'versionType': 'git'}, {'status': 'affected', 'version': '8230fd8217b7ea76f838ae88e4a5a8e54f37099f', 'lessThan': 'e3e59ff22a0de01ed0cf3a3e25558811abc3b70a', 'versionType': 'git'}, {'status': 'affected', 'version': '8230fd8217b7ea76f838ae88e4a5a8e54f37099f', 'lessThan': '794a01110390c1b76f59ece773fb0fbfd89c6f5c', 'versionType': 'git'}], 'programFiles': ['fs/afs/callback.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/afs/callback.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: afs: Fix missing NULL pointer check in afs_break_some_callbacks() Fix afs_break_some_callbacks() to check to see if afs_lookup_volume_rcu() returned NULL (e.g. the specified volume is unknown). Added Reference https://git.kernel.org/stable/c/5492799ec5d27be3bd454dcaf046bc7054f637ae Added Reference https://git.kernel.org/stable/c/794a01110390c1b76f59ece773fb0fbfd89c6f5c Added Reference https://git.kernel.org/stable/c/a99a617701186dc68c7b330d35fc2253f48e2ab2 Added Reference https://git.kernel.org/stable/c/e3e59ff22a0de01ed0cf3a3e25558811abc3b70a