---
id: CVE-2026-53195
title: 'USB: serial: io_ti: fix heap overflow in build_i2c_fw_hdr()'
summary: |-
  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) by…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    3e187152f44d76d7633a3855ffd0099e1588b82a
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    b7faf660eefa2047ebc2959ff76da2b6eae2e9e3
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    2fd64bf0ad66ab5de0c73524591d879427ba5aba
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    4cb722747ed25971f35cc47ce5c0e79d7f717713
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    130d6567eb148040eed1b73e1414ad6c27d22bd5
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    294692d3296eee3391c348d7ea6401916d27806c
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    5a79b634ee58786ca627268daefa7744f2af2e14
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    0fd2b00b2d3d05e3eaa13342b3dfb0fa85c226ae
  - Linux 2.6.12
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:22:00.520145Z'
published: '2026-06-25'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T16:24:06.702Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-53195'
references:
  - url: 'https://git.kernel.org/stable/c/3e187152f44d76d7633a3855ffd0099e1588b82a'
  - url: 'https://git.kernel.org/stable/c/b7faf660eefa2047ebc2959ff76da2b6eae2e9e3'
  - url: 'https://git.kernel.org/stable/c/2fd64bf0ad66ab5de0c73524591d879427ba5aba'
  - url: 'https://git.kernel.org/stable/c/4cb722747ed25971f35cc47ce5c0e79d7f717713'
  - url: 'https://git.kernel.org/stable/c/130d6567eb148040eed1b73e1414ad6c27d22bd5'
  - url: 'https://git.kernel.org/stable/c/294692d3296eee3391c348d7ea6401916d27806c'
  - url: 'https://git.kernel.org/stable/c/5a79b634ee58786ca627268daefa7744f2af2e14'
  - url: 'https://git.kernel.org/stable/c/0fd2b00b2d3d05e3eaa13342b3dfb0fa85c226ae'
tags:
  - cve.org
epss: 0.00143
epssPercentile: 0.03604
ingestedAt: '2026-11-06T16:57:43.271Z'
---

## Overview

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.

## Affected

- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3e187152f44d76d7633a3855ffd0099e1588b82a`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b7faf660eefa2047ebc2959ff76da2b6eae2e9e3`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2fd64bf0ad66ab5de0c73524591d879427ba5aba`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4cb722747ed25971f35cc47ce5c0e79d7f717713`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 130d6567eb148040eed1b73e1414ad6c27d22bd5`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 294692d3296eee3391c348d7ea6401916d27806c`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5a79b634ee58786ca627268daefa7744f2af2e14`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 0fd2b00b2d3d05e3eaa13342b3dfb0fa85c226ae`
- `Linux 2.6.12`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.