hwmon: occ: validate poll response sensor blocks
Summary
| CVE | CVE-2026-68340 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-10 13:20:24 UTC |
| Updated | 2026-08-13 23:17:31 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 7.7 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
EPSS: 0.001750000 probability, percentile 0.072340000 (date 2026-08-13)
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 7.7 | HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| 3.1 | CNA | DECLARED | 7.7 | HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
NoneAvailability
HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected aa195fe49b033db545ad986cdb2c431c37bea557 112525534ab5cff482d35897ca4ca11fd3a76f46 git | Not specified |
| CNA | Linux | Linux | affected aa195fe49b033db545ad986cdb2c431c37bea557 54cb78eceb4e286ccd5a5c01a4632157860d47f0 git | Not specified |
| CNA | Linux | Linux | affected aa195fe49b033db545ad986cdb2c431c37bea557 538d862cc0dbd5c732fe26d5aad98eae039e6676 git | Not specified |
| CNA | Linux | Linux | affected aa195fe49b033db545ad986cdb2c431c37bea557 b042e538e98b939fccfffc464e2c34c29f0e96ef git | Not specified |
| CNA | Linux | Linux | affected aa195fe49b033db545ad986cdb2c431c37bea557 70e76e700fc6c46afb4e17aec099a1ea089b4a22 git | Not specified |
| CNA | Linux | Linux | affected 5.0 | Not specified |
| CNA | Linux | Linux | unaffected 5.0 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.148 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.101 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.42 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.6 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2-rc5 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/54cb78eceb4e286ccd5a5c01a4632157860d47f0 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/70e76e700fc6c46afb4e17aec099a1ea089b4a22 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b042e538e98b939fccfffc464e2c34c29f0e96ef | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/538d862cc0dbd5c732fe26d5aad98eae039e6676 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/112525534ab5cff482d35897ca4ca11fd3a76f46 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.