VulnerabilityPublished 19 Jul 2026

CVE-2026-63931: Linux kernel · iio: chemical: scd30: fix division by zero in write_raw

Source GCVE Database

Not known to be exploited.

Data as of 26 Oct 2026, 15:59 UTC

Severity

Medium

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.2% chance of exploitation in 30 days – higher than 11% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

Disclosed: evidence found.
CVE published 19 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-63gc-r7wc-mrxq

What to do

AI-suggested

A fix has been applied to the Linux kernel to add a zero check before division in the affected driver. Users should update their Linux kernel to a version that includes this fix. Patch status is not explicitly confirmed in the provided data; therefore, users should consult the official Linux kernel advisories or repositories for the fixed version and apply the update accordingly.

Description

A division by zero vulnerability was identified and fixed in the Linux kernel's iio chemical scd30 driver. The issue occurred when a user wrote a zero fractional part to the sampling_frequency sysfs attribute, causing a division by zero error in the kernel. This could lead to kernel instability or crashes. The vulnerability has been resolved by adding a zero check before using the divisor.

References

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