CVE-2026-53196

A flaw was found in the Linux kernel's io_ti USB serial driver. A malicious USB device, when plugged into a host running this driver, can exploit a heap overflow vulnerability in the get_manuf_info() function. This occurs because the driver does not properly validate the size of data read from the device's I2C EEPROM against the allocated memory buffer. This improper validation can lead to out-of-bounds memory writes, potentially allowing an attacker to execute arbitrary code or cause a system crash (Denial of Service).

get_manuf_info() in the USB serial io_ti driver can copy a device controlled EEPROM descriptor length into a 10 byte heap buffer without checking that the descriptor Size matches sizeof(struct edge_ti_manuf_descriptor). A malicious USB device can advertise a Size value up to the TI I2C image limit and trigger a large heap overflow when the device is attached and the driver reads the descriptor. For the CVSS the PR:N is used because the attacker does not need an account on the host and only needs the malicious USB device to be processed by the vulnerable driver. Impact is at least kernel crash DoS and because this is a kernel heap overflow with device controlled input, confidentiality and integrity impact are plausible in worst case.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

To mitigate this issue, prevent module io_ti from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.