7.8
HIGH
CVSS 3.1
CVE-2026-64361
hfs/hfsplus: fix u32 overflow in check_and_correct_requested_length
Overview
Description
In the Linux kernel, the following vulnerability has been resolved: hfs/hfsplus: fix u32 overflow in check_and_correct_requested_length check_and_correct_requested_length() compares (off + len) against node_size using u32 arithmetic. When the caller passes a large len value (e.g. from an underflowed subtraction in hfs_brec_remove()), off + len can wrap past 2^32 and produce a small result, causing the bounds check to pass when it should fail. For example, with off=14 and len=0xFFFFFFF2 (underflowed from data_off - keyoffset - size in hfs_brec_remove), off + len wraps to 6, which is less than a typical node_size of 512, so the check passes and the subsequent memmove reads ~4GB past the node buffer. Fix this by widening the addition to u64 before comparing against node_size. This prevents the u32 wrap while keeping the logic straightforward.
Details
INFO
Published Date :
July 25, 2026, 10:17 a.m.
Last Modified :
Aug. 17, 2026, 5:17 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
Fix integer overflow in length check by using 64-bit arithmetic.
- Apply the patch to the Linux kernel.
- Ensure the fix for hfs/hfsplus is included.
- Update the kernel to a patched version.
References
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-2026-64361.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64361 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-2026-64361
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-2026-64361 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64361 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 Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '67ecc81f6492275c9c54280532f558483c99c90e', 'lessThan': 'c8dd112173c02adf539fe2ad34a45f5e0068780d', 'versionType': 'git'}, {'status': 'affected', 'version': 'a1a60e79502279f996e55052f50cc14919020475', 'lessThan': 'fc9d1447ca3cdc78d2e4ace1ce1f3a7c77ca08b1', 'versionType': 'git'}, {'status': 'affected', 'version': 'fe2891a9c43ab87d1a210d61e6438ca6936e2f62', 'lessThan': '671c3fcc2ad31c1311ea6414382a2d95104ae1b9', 'versionType': 'git'}, {'status': 'affected', 'version': '384a66b89f9540a9a8cb0f48807697dfabaece4c', 'lessThan': 'b6a481642ea1977be2f84dc08c5affd742c177e7', 'versionType': 'git'}, {'status': 'affected', 'version': 'efc095b35b23297e419c2ab4fc1ed1a8f0781a29', 'lessThan': '7399c3baee7bb622a92f0b895cd4d3009a693f2b', 'versionType': 'git'}, {'status': 'affected', 'version': 'a431930c9bac518bf99d6b1da526a7f37ddee8d8', 'lessThan': '607217f7ad419b53926f71e3f75001813bbc08ad', 'versionType': 'git'}, {'status': 'affected', 'version': 'a431930c9bac518bf99d6b1da526a7f37ddee8d8', 'lessThan': 'c25d3c931a63e762fcaa9cb125b901c53b62403f', 'versionType': 'git'}, {'status': 'affected', 'version': 'a431930c9bac518bf99d6b1da526a7f37ddee8d8', 'lessThan': '966cb76fb2857a4242cab6ea2ea17acf818a3da7', 'versionType': 'git'}, {'status': 'affected', 'version': 'e7d2dc2421e821e4045775e6dc226378328de6f6', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc7f732984ec91f30be3e574e0644066d07f2b78', 'versionType': 'git'}, {'status': 'affected', 'version': 'eec522fd0d28106b14a59ab2d658605febe4a3bb', 'versionType': 'git'}, {'status': 'affected', 'version': '5.10.241', 'lessThan': '5.10.261', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.190', 'lessThan': '5.15.212', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.149', 'lessThan': '6.1.178', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.103', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.43', 'lessThan': '6.12.97', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.4.297', 'lessThan': '5.5', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.15.11', 'lessThan': '6.16', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.16.2', 'lessThan': '6.17', 'versionType': 'semver'}], 'programFiles': ['fs/hfs/bnode.c', 'fs/hfsplus/hfsplus_fs.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.17', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'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': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/hfs/bnode.c', 'fs/hfsplus/hfsplus_fs.h'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '67ecc81f6492275c9c54280532f558483c99c90e', 'lessThan': 'c8dd112173c02adf539fe2ad34a45f5e0068780d', 'versionType': 'git'}, {'status': 'affected', 'version': 'a1a60e79502279f996e55052f50cc14919020475', 'lessThan': 'fc9d1447ca3cdc78d2e4ace1ce1f3a7c77ca08b1', 'versionType': 'git'}, {'status': 'affected', 'version': 'fe2891a9c43ab87d1a210d61e6438ca6936e2f62', 'lessThan': '671c3fcc2ad31c1311ea6414382a2d95104ae1b9', 'versionType': 'git'}, {'status': 'affected', 'version': '384a66b89f9540a9a8cb0f48807697dfabaece4c', 'lessThan': 'b6a481642ea1977be2f84dc08c5affd742c177e7', 'versionType': 'git'}, {'status': 'affected', 'version': 'efc095b35b23297e419c2ab4fc1ed1a8f0781a29', 'lessThan': '7399c3baee7bb622a92f0b895cd4d3009a693f2b', 'versionType': 'git'}, {'status': 'affected', 'version': 'a431930c9bac518bf99d6b1da526a7f37ddee8d8', 'lessThan': '607217f7ad419b53926f71e3f75001813bbc08ad', 'versionType': 'git'}, {'status': 'affected', 'version': 'a431930c9bac518bf99d6b1da526a7f37ddee8d8', 'lessThan': 'c25d3c931a63e762fcaa9cb125b901c53b62403f', 'versionType': 'git'}, {'status': 'affected', 'version': 'a431930c9bac518bf99d6b1da526a7f37ddee8d8', 'lessThan': '966cb76fb2857a4242cab6ea2ea17acf818a3da7', 'versionType': 'git'}, {'status': 'affected', 'version': 'e7d2dc2421e821e4045775e6dc226378328de6f6', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc7f732984ec91f30be3e574e0644066d07f2b78', 'versionType': 'git'}, {'status': 'affected', 'version': 'eec522fd0d28106b14a59ab2d658605febe4a3bb', 'versionType': 'git'}, {'status': 'affected', 'version': '5.10.241', 'lessThan': '5.10.261', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.190', 'lessThan': '5.15.212', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.149', 'lessThan': '6.1.178', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.103', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.43', 'lessThan': '6.12.97', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.4.297', 'lessThan': '5.5', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.15.11', 'lessThan': '6.16', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.16.2', 'lessThan': '6.17', 'versionType': 'semver'}], 'programFiles': ['fs/hfs/bnode.c', 'fs/hfsplus/hfsplus_fs.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.17', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'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': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/hfs/bnode.c', 'fs/hfsplus/hfsplus_fs.h'], 'defaultStatus': 'affected'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 27, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 25, 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': '67ecc81f6492275c9c54280532f558483c99c90e', 'lessThan': 'c8dd112173c02adf539fe2ad34a45f5e0068780d', 'versionType': 'git'}, {'status': 'affected', 'version': 'a1a60e79502279f996e55052f50cc14919020475', 'lessThan': 'fc9d1447ca3cdc78d2e4ace1ce1f3a7c77ca08b1', 'versionType': 'git'}, {'status': 'affected', 'version': 'fe2891a9c43ab87d1a210d61e6438ca6936e2f62', 'lessThan': '671c3fcc2ad31c1311ea6414382a2d95104ae1b9', 'versionType': 'git'}, {'status': 'affected', 'version': '384a66b89f9540a9a8cb0f48807697dfabaece4c', 'lessThan': 'b6a481642ea1977be2f84dc08c5affd742c177e7', 'versionType': 'git'}, {'status': 'affected', 'version': 'efc095b35b23297e419c2ab4fc1ed1a8f0781a29', 'lessThan': '7399c3baee7bb622a92f0b895cd4d3009a693f2b', 'versionType': 'git'}, {'status': 'affected', 'version': 'a431930c9bac518bf99d6b1da526a7f37ddee8d8', 'lessThan': '607217f7ad419b53926f71e3f75001813bbc08ad', 'versionType': 'git'}, {'status': 'affected', 'version': 'a431930c9bac518bf99d6b1da526a7f37ddee8d8', 'lessThan': 'c25d3c931a63e762fcaa9cb125b901c53b62403f', 'versionType': 'git'}, {'status': 'affected', 'version': 'a431930c9bac518bf99d6b1da526a7f37ddee8d8', 'lessThan': '966cb76fb2857a4242cab6ea2ea17acf818a3da7', 'versionType': 'git'}, {'status': 'affected', 'version': 'e7d2dc2421e821e4045775e6dc226378328de6f6', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc7f732984ec91f30be3e574e0644066d07f2b78', 'versionType': 'git'}, {'status': 'affected', 'version': 'eec522fd0d28106b14a59ab2d658605febe4a3bb', 'versionType': 'git'}, {'status': 'affected', 'version': '5.10.241', 'lessThan': '5.10.261', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.190', 'lessThan': '5.15.212', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.149', 'lessThan': '6.1.178', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.103', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.43', 'lessThan': '6.12.97', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.4.297', 'lessThan': '5.5', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.15.11', 'lessThan': '6.16', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.16.2', 'lessThan': '6.17', 'versionType': 'semver'}], 'programFiles': ['fs/hfs/bnode.c', 'fs/hfsplus/hfsplus_fs.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.17', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'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': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/hfs/bnode.c', 'fs/hfsplus/hfsplus_fs.h'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: hfs/hfsplus: fix u32 overflow in check_and_correct_requested_length check_and_correct_requested_length() compares (off + len) against node_size using u32 arithmetic. When the caller passes a large len value (e.g. from an underflowed subtraction in hfs_brec_remove()), off + len can wrap past 2^32 and produce a small result, causing the bounds check to pass when it should fail. For example, with off=14 and len=0xFFFFFFF2 (underflowed from data_off - keyoffset - size in hfs_brec_remove), off + len wraps to 6, which is less than a typical node_size of 512, so the check passes and the subsequent memmove reads ~4GB past the node buffer. Fix this by widening the addition to u64 before comparing against node_size. This prevents the u32 wrap while keeping the logic straightforward. Added Reference https://git.kernel.org/stable/c/607217f7ad419b53926f71e3f75001813bbc08ad Added Reference https://git.kernel.org/stable/c/671c3fcc2ad31c1311ea6414382a2d95104ae1b9 Added Reference https://git.kernel.org/stable/c/7399c3baee7bb622a92f0b895cd4d3009a693f2b Added Reference https://git.kernel.org/stable/c/966cb76fb2857a4242cab6ea2ea17acf818a3da7 Added Reference https://git.kernel.org/stable/c/b6a481642ea1977be2f84dc08c5affd742c177e7 Added Reference https://git.kernel.org/stable/c/c25d3c931a63e762fcaa9cb125b901c53b62403f Added Reference https://git.kernel.org/stable/c/c8dd112173c02adf539fe2ad34a45f5e0068780d Added Reference https://git.kernel.org/stable/c/fc9d1447ca3cdc78d2e4ace1ce1f3a7c77ca08b1
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.