CVE-2026-64236: Linux

Описание

Оригинално описание

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.

Засегнати продукти

• Linux Linux: b04ce63859793e3439b394976b8d29e785d4d69a преди 3f43865cb64dd7cb50efae1281a95585617b12a1; b04ce63859793e3439b394976b8d29e785d4d69a преди 9b694bc0e1831cbc5c3bbfd1b156ec719128f7d9; b04ce63859793e3439b394976b8d29e785d4d69a преди 030675aa54cf757769b3db65642433d626b3ed7c
• Linux Linux: 6.14; преди 6.14; 6.18.35 до 6.18.*; 7.0.12 до 7.0.*; от 7.1 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-64236
• https://nvd.nist.gov/vuln/detail/CVE-2026-64236
• https://git.kernel.org/stable/c/3f43865cb64dd7cb50efae1281a95585617b12a1
• https://git.kernel.org/stable/c/9b694bc0e1831cbc5c3bbfd1b156ec719128f7d9
• https://git.kernel.org/stable/c/030675aa54cf757769b3db65642433d626b3ed7c