Riskcovery

CVE-2026-64236

i2c: davinci: fix division by zero on missing clock-frequency

State
Published
Severity
Not scored
Published
Jul 24, 2026
Updated
Jul 24, 2026
Reserved
Jul 19, 2026

Read the record on cve.org

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • b04ce63859793e3439b394976b8d29e785d4d69a to before 3f43865cb64dd7cb50efae1281a95585617b12a1Affected
  • b04ce63859793e3439b394976b8d29e785d4d69a to before 9b694bc0e1831cbc5c3bbfd1b156ec719128f7d9Affected
  • b04ce63859793e3439b394976b8d29e785d4d69a to before 030675aa54cf757769b3db65642433d626b3ed7cAffected
LinuxLinux
  • 6.14Affected
  • before 6.14Not affected
  • 6.18.35 through 6.18.*Not affected
  • 7.0.12 through 7.0.*Not affected
  • 7.1 and laterNot affected

References

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