CVE-2026-53195
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk10th percentile — higher than 10% of all known CVEs
Summary
In the Linux kernel, a vulnerability in the USB serial io_ti driver was found where build_i2c_fw_hdr() allocates a fixed-size buffer but copies user-controlled length data (up to 65535 bytes) without validation, causing a heap overflow.
Risk Assessment
An attacker with system access could exploit this heap overflow to cause a system crash or potentially escalate privileges.
Recommendation
Immediately update the Linux kernel to a version containing the fix that rejects firmware images with a length exceeding the available destination buffer space.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: USB: serial: io_ti: fix heap overflow in build_i2c_fw_hdr() build_i2c_fw_hdr() allocates a fixed-size buffer of (16*1024 - 512) + sizeof(struct ti_i2c_firmware_rec) bytes, then copies le16_to_cpu(img_header->Length) bytes into it without validating that Length fits within the available space after the firmware record header. img_header->Length is a __le16 from the firmware file and can be up to 65535. check_fw_sanity() validates the total firmware size but not img_header->Length specifically. Fix by rejecting images where img_header->Length exceeds the available destination space.