CVE-2026-68340
hwmon: occ: validate poll response sensor blocks
Description
In the Linux kernel, the following vulnerability has been resolved: hwmon: occ: validate poll response sensor blocks The OCC poll response parser walks a counted list of sensor data blocks. It used the static backing-array capacity as the parse boundary, but a transport response makes only data_length bytes current and valid. A truncated response can therefore make the parser consume a block header or block extent outside the current response. Use data_length as the parent boundary, prove the fixed poll header and each current block header before reading them, and prove the complete block before advancing. Keep parsed sensor metadata local until the complete response has passed validation, then publish it. Propagate malformed-response errors before publishing the OCC as active.
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-2026-68340
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
- Ensure data_length is the parent boundary for parsing.
- Validate poll header and block headers before reading.
- Validate complete block before advancing parser.
- Publish sensor metadata only after validation.
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-2026-68340.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68340 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-2026-68340
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-2026-68340 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68340 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.
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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': 'aa195fe49b033db545ad986cdb2c431c37bea557', 'lessThan': '112525534ab5cff482d35897ca4ca11fd3a76f46', 'versionType': 'git'}, {'status': 'affected', 'version': 'aa195fe49b033db545ad986cdb2c431c37bea557', 'lessThan': '54cb78eceb4e286ccd5a5c01a4632157860d47f0', 'versionType': 'git'}, {'status': 'affected', 'version': 'aa195fe49b033db545ad986cdb2c431c37bea557', 'lessThan': '538d862cc0dbd5c732fe26d5aad98eae039e6676', 'versionType': 'git'}, {'status': 'affected', 'version': 'aa195fe49b033db545ad986cdb2c431c37bea557', 'lessThan': 'b042e538e98b939fccfffc464e2c34c29f0e96ef', 'versionType': 'git'}, {'status': 'affected', 'version': 'aa195fe49b033db545ad986cdb2c431c37bea557', 'lessThan': '70e76e700fc6c46afb4e17aec099a1ea089b4a22', 'versionType': 'git'}], 'programFiles': ['drivers/hwmon/occ/common.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.0'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.0', '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-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/hwmon/occ/common.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: hwmon: occ: validate poll response sensor blocks The OCC poll response parser walks a counted list of sensor data blocks. It used the static backing-array capacity as the parse boundary, but a transport response makes only data_length bytes current and valid. A truncated response can therefore make the parser consume a block header or block extent outside the current response. Use data_length as the parent boundary, prove the fixed poll header and each current block header before reading them, and prove the complete block before advancing. Keep parsed sensor metadata local until the complete response has passed validation, then publish it. Propagate malformed-response errors before publishing the OCC as active. Added Reference https://git.kernel.org/stable/c/112525534ab5cff482d35897ca4ca11fd3a76f46 Added Reference https://git.kernel.org/stable/c/538d862cc0dbd5c732fe26d5aad98eae039e6676 Added Reference https://git.kernel.org/stable/c/54cb78eceb4e286ccd5a5c01a4632157860d47f0 Added Reference https://git.kernel.org/stable/c/70e76e700fc6c46afb4e17aec099a1ea089b4a22 Added Reference https://git.kernel.org/stable/c/b042e538e98b939fccfffc464e2c34c29f0e96ef