CVE-2026-68340hwmon: occ: validate poll response sensor blocks
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.7 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from aa195fe49b033db545ad986cdb2c431c37bea557 before 6e6c72c37433640514db325408bd6913ad28fe69; from aa195fe49b033db545ad986cdb2c431c37bea557 before 1902e9572901d37901e3db1f3f6b0885f4e49a66; from aa195fe49b033db545ad986cdb2c431c37bea557 before 112525534ab5cff482d35897ca4ca11fd3a76f46; from aa195fe49b033db545ad986cdb2c431c37bea557 before 54cb78eceb4e286ccd5a5c01a4632157860d47f0; from aa195fe49b033db545ad986cdb2c431c37bea557 before 538d862cc0dbd5c732fe26d5aad98eae039e6676; from aa195fe49b033db545ad986cdb2c431c37bea557 before b042e538e98b939fccfffc464e2c34c29f0e96ef; from aa195fe49b033db545ad986cdb2c431c37bea557 before 70e76e700fc6c46afb4e17aec099a1ea089b4a22 | CNA record |
References
- https://git.kernel.org/stable/c/6e6c72c37433640514db325408bd6913ad28fe69
- https://git.kernel.org/stable/c/1902e9572901d37901e3db1f3f6b0885f4e49a66
- https://git.kernel.org/stable/c/112525534ab5cff482d35897ca4ca11fd3a76f46
- https://git.kernel.org/stable/c/54cb78eceb4e286ccd5a5c01a4632157860d47f0
- https://git.kernel.org/stable/c/538d862cc0dbd5c732fe26d5aad98eae039e6676
- https://git.kernel.org/stable/c/b042e538e98b939fccfffc464e2c34c29f0e96ef
- https://git.kernel.org/stable/c/70e76e700fc6c46afb4e17aec099a1ea089b4a22
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.