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CVE-2026-52948: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: i2c: dev: prevent integer overflow in I2C_TIMEOUT ioctl While fuzzing with Syzkaller, a persistent `schedule_timeout: wrong timeout value` warning was observed, accompanied by SMBus controller state machine corruption. The I2C_TIMEOUT ioctl accepts a user-provided timeout in multiples of 10 ms. The user argument is checked against INT_MAX, but it is subsequently multiplied by 10 before being passed to msecs_to_jiffies(). A malicious user can pass a large value (e.g., 429496729) that passes the `arg > INT_MAX` check but overflows when multiplied by 10. This results in a truncated 32-bit unsigned value that bypasses the internal `(int)m < 0` check in `msecs_to_jiffies()`. The truncated value is then assigned to `client->adapter->timeout` (a signed 32-bit int), which is reinterpreted as a negative number. When passed to wait_for_completion_timeout(), this negative value undergoes sign extension to a 64-bit unsigned long, triggering the `schedule_timeout` warning and causing premature returns. This leaves the SMBus state machine in an unrecoverable state, constituting a local Denial of Service (DoS). Fix this by bounding the user argument to `INT_MAX / 10`. [wsa: move the comment as well]

    Засегнати продукти

    • Linux Linux: cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d преди e9ffd5f5050fbb199d270a85614cd27ebed6fbac; cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d преди 0b88ecfbc9dc33b4db8836c37b50cf174e6c0691; cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d преди 943e318eedbeaeea08ece3f5dd44c982f4ed2ef5; cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d преди aa6ef734016912653a909477fb30aeb66c98b3a2; cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d преди ff02add34ffd03449b8115904ebe2ec4fed022d4; cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d преди ffbcf31f032eb454ebfd29309f51366fe57f4ac4; cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d преди 4576621dc6577f21a032acfd16c3ad61907a5ea7; cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d преди 617eb7c0961a8dfcfc811844a6396e406b2923ea
    • Linux Linux: 2.6.29; преди 2.6.29; 5.10.259 до 5.10.*; 5.15.210 до 5.15.*; 6.1.176 до 6.1.*; 6.6.143 до 6.6.*; 6.12.94 до 6.12.*; 6.18.36 до 6.18.*; 7.0.13 до 7.0.*; от 7.1 нататък
    • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem: всички версии

    История

    • 24 юни 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-52948: Linux | freedomonline.bg