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CVE-2026-68340

Unknown

Last modified

CVE-2026-68340 is a vulnerability of currently unknown severity. 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.

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= aa195fe49b033db545ad986cdb2c431c37bea557, < 112525534ab5cff482d35897ca4ca11fd3a76f46; >= aa195fe49b033db545ad986cdb2c431c37bea557, < 54cb78eceb4e286ccd5a5c01a4632157860d47f0; >= aa195fe49b033db545ad986cdb2c431c37bea557, < 538d862cc0dbd5c732fe26d5aad98eae039e6676; >= aa195fe49b033db545ad986cdb2c431c37bea557, < b042e538e98b939fccfffc464e2c34c29f0e96ef; >= aa195fe49b033db545ad986cdb2c431c37bea557, < 70e76e700fc6c46afb4e17aec099a1ea089b4a22
LinuxLinux5.0

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-68340?
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.
How severe is CVE-2026-68340?
Severity scoring for CVE-2026-68340 is pending analysis.
How do I fix CVE-2026-68340?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST