CVE-2026-64497

Incorrect sensor readings via sign-extension error

Published Jul 25, 2026 · Updated Jul 25, 2026

Incorrect numeric conversion in the Linux Kernel SCD30 driver allows corrupted CO2, temperature, and humidity sensor readings. In scd30_float_to_fp(), (float32 & ~BIT(31)) retains promoted upper mask bits before shifting, corrupting the extracted exponent instead of isolating bits 30 through 23. The defect requires a build with 64-bit unsigned long and an attached SCD30 sensor; the bounded consequence is inaccurate environmental measurements.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect numeric conversion in the Linux Kernel SCD30 driver allows corrupted CO2, temperature, and humidity sensor readings. In scd30_float_to_fp(), (float32 & ~BIT(31)) retains promoted upper mask bits before shifting, corrupting the extracted exponent instead of isolating bits 30 through 23. The defect requires a build with 64-bit unsigned long and an attached SCD30 sensor; the bounded consequence is inaccurate environmental measurements.

The record

CVE
CVE-2026-64497
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-681
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Jul 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.9
  2. Affected versionversion=64b3d8b1b0f5c16c19045785e4da8391ae35ec99 <0ccff849bde90973e6c13a666f6ceab5c55b30d4
  3. Affected versionversion=64b3d8b1b0f5c16c19045785e4da8391ae35ec99 <1821bcacd8ac5b214c53be16cbb8172bf193f0b6
  4. Affected versionversion=64b3d8b1b0f5c16c19045785e4da8391ae35ec99 <40bb0fdb37f441c9c9f52bf58bbd8a0ca3cc9598
  5. Affected versionversion=64b3d8b1b0f5c16c19045785e4da8391ae35ec99 <60d877910a43c305b5165131b258a17b1d772d57
  6. Affected versionversion=64b3d8b1b0f5c16c19045785e4da8391ae35ec99 <82accdd57404399eddf3d56fd9beda7c61307388
  7. Affected versionversion=64b3d8b1b0f5c16c19045785e4da8391ae35ec99 <8d4a46e971cf846bda98b20d4cabfa21c1276e5f
  8. Affected versionversion=64b3d8b1b0f5c16c19045785e4da8391ae35ec99 <b131f0011dfef72350f4e3f11df94dc3e6b46065
  9. Affected versionversion=64b3d8b1b0f5c16c19045785e4da8391ae35ec99 <d49ff54b2784aa56a7c97982de713604de89d23a

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.9; version=64b3d8b1b0f5c16c19045785e4da8391ae35ec99 <0ccff849bde90973e6c13a666f6ceab5c55b30d4; version=64b3d8b1b0f5c16c19045785e4da8391ae35ec99 <1821bcacd8ac5b214c53be16cbb8172bf193f0b6; version=64b3d8b1b0f5c16c19045785e4da8391ae35ec99 <40bb0fdb37f441c9c9f52bf58bbd8a0ca3cc9598; version=64b3d8b1b0f5c16c19045785e4da8391ae35ec99 <60d877910a43c305b5165131b258a17b1d772d57; version=64b3d8b1b0f5c16c19045785e4da8391ae35ec99 <82accdd57404399eddf3d56fd9beda7c61307388; version=64b3d8b1b0f5c16c19045785e4da8391ae35ec99 <8d4a46e971cf846bda98b20d4cabfa21c1276e5f; version=64b3d8b1b0f5c16c19045785e4da8391ae35ec99 <b131f0011dfef72350f4e3f11df94dc3e6b46065; version=64b3d8b1b0f5c16c19045785e4da8391ae35ec99 <d49ff54b2784aa56a7c97982de713604de89d23a

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-681Incorrect Conversion between Numeric Types

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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