CVE-2026-64236 (GCVE-0-2026-64236)

Vulnerability from cvelistv5 – Published: 2026-07-24 15:27 – Updated: 2026-07-24 15:27
VLAI
Title
i2c: davinci: fix division by zero on missing clock-frequency
Summary
In the Linux kernel, the following vulnerability has been resolved: i2c: davinci: fix division by zero on missing clock-frequency When the 'clock-frequency' property is missing from the device tree, the driver falls back to DAVINCI_I2C_DEFAULT_BUS_FREQ. However, this macro was defined in kHz (100), whereas the device tree property is expected in Hz. The probe function divided the fallback value by 1000, causing integer truncation that resulted in dev->bus_freq = 0. This triggered a deterministic division-by-zero kernel panic when calculating clock dividers later in the probe sequence. Fix this by redefining DAVINCI_I2C_DEFAULT_BUS_FREQ in Hz (100000) to match the expected device tree property unit, allowing the existing division logic to work correctly for both cases.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: b04ce63859793e3439b394976b8d29e785d4d69a , < 3f43865cb64dd7cb50efae1281a95585617b12a1 (git)
Affected: b04ce63859793e3439b394976b8d29e785d4d69a , < 9b694bc0e1831cbc5c3bbfd1b156ec719128f7d9 (git)
Affected: b04ce63859793e3439b394976b8d29e785d4d69a , < 030675aa54cf757769b3db65642433d626b3ed7c (git)
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Linux Linux Affected: 6.14
Unaffected: 0 , < 6.14 (semver)
Unaffected: 6.18.35 , ≤ 6.18.* (semver)
Unaffected: 7.0.12 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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      "id": "CVE-2026-64236",
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: i2c: davinci: fix division by zero on missing clock-frequency",
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