hwmon: occ: validate poll response sensor blocks
Published Aug 10, 2026
7.7
HIGHCVSS 3.1
EPSS 0.19%
Description
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 products
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- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version
-
- Version 5.0StatusaffectedConstraints-
- Version 0StatusunaffectedConstraints<5.0
- Version 5.15.216StatusunaffectedConstraints<=5.15.*
- Version 6.1.183StatusunaffectedConstraints<=6.1.*
- Version 6.12.101StatusunaffectedConstraints<=6.12.*
- Version 6.18.42StatusunaffectedConstraints<=6.18.*
- Version 6.6.148StatusunaffectedConstraints<=6.6.*
- Version 7.1.6StatusunaffectedConstraints<=7.1.*
- Version 7.2StatusunaffectedConstraints<=*
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux | unaffected |
| ||||||||||||||||||||||||||||||
| Linux | Linux | affected |
|
No data.
No data.
Red Hat Enterprise Linux 10
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise Linux 8
kernel-rt
Not affected
Red Hat Enterprise Linux 9
kernel
Not affected
Red Hat Enterprise Linux 9
kernel-rt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Aug–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.19% (0.00190) | 7.84th | v5 (v2026.06.15) |
| Aug 11, 2026 | 0.18% (0.00175) | 7.23th | v5 (v2026.06.15) |
References (12)
- https://access.redhat.com/security/cve/CVE-2026-68340 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2513447 Issue Tracking
- https://git.kernel.org/stable/c/112525534ab5cff482d35897ca4ca11fd3a76f46
- https://git.kernel.org/stable/c/1902e9572901d37901e3db1f3f6b0885f4e49a66
- https://git.kernel.org/stable/c/538d862cc0dbd5c732fe26d5aad98eae039e6676
- https://git.kernel.org/stable/c/54cb78eceb4e286ccd5a5c01a4632157860d47f0
- https://git.kernel.org/stable/c/6e6c72c37433640514db325408bd6913ad28fe69
- https://git.kernel.org/stable/c/70e76e700fc6c46afb4e17aec099a1ea089b4a22
- https://git.kernel.org/stable/c/b042e538e98b939fccfffc464e2c34c29f0e96ef
- https://lore.kernel.org/linux-cve-announce/2026081037-CVE-2026-68340-beaa@gregkh/T
- https://nvd.nist.gov/vuln/detail/CVE-2026-68340
- https://www.cve.org/CVERecord?id=CVE-2026-68340
Change history (0)
No recorded changes yet.