# nvme-tcp: reject a read that transferred too few bytes

CVE record · `CVE-2026-89480`

- **Identifiers:** `CVE-2026-89480`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 11 Sept 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:43 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `3f2304f8c6d6ed97849057bd16fee99e434ca796 to before b674af31d044a86bd094ba8bb8f2bb92fb49aac5` (git)
  - affected: `3f2304f8c6d6ed97849057bd16fee99e434ca796 to before a5c1bb0fb1bab2f24a081339c145870697f6d220` (git)
  - affected: `3f2304f8c6d6ed97849057bd16fee99e434ca796 to before aa107e3a68f4af177d60f2d87679e7f67179a36c` (git)
  - affected: `3f2304f8c6d6ed97849057bd16fee99e434ca796 to before fca3ebb63e5c82561cd9934365dcc0d068008006` (git)
  - affected: `3f2304f8c6d6ed97849057bd16fee99e434ca796 to before 99066cf9bba175f610ceb61a35f6fc9fbc33ff65` (git)
  - affected: `3f2304f8c6d6ed97849057bd16fee99e434ca796 to before 8a02ad98798fd01f51f648c1fdd8f3c9d07195d3` (git)
  - affected: `3f2304f8c6d6ed97849057bd16fee99e434ca796 to before 832a685efeb5d925ee7d30011d2dbe45f81447a3` (git)
  - affected: `3f2304f8c6d6ed97849057bd16fee99e434ca796 to before 7fa3f73f6c8ddc5f0425b50fb2a626a782ef7d12` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.0`
  - unaffected: `before 5.0` (semver)
  - unaffected: `5.10.273 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.221 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.188 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.157 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.109 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.50 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.4 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Linux kernel nvme-tcp: versions from commit 3f2304f8c6d6ed97849057bd16fee99e434ca796 up to the fixes listed in the advisory are affected, and 5.0 is affected, with 5.10.273, 5.15.221, 6.1.188 and 6.6.157 and later stable releases in those series unaffected. The source does not state the attacker's position, but a malicious or faulty NVMe/TCP controller can answer a read with fewer bytes than requested, and the kernel reports it as complete, so user space receives stale data from memory. Upgrade to a fixed kernel release for your branch.

Written 12 Nov 2026.

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 7.5 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0043, the 37th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 11 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89480](https://www.cve.org/CVERecord?id=CVE-2026-89480)
- [NVD: CVE-2026-89480](https://nvd.nist.gov/vuln/detail/CVE-2026-89480)

### References from the CNA

- <https://git.kernel.org/stable/c/b674af31d044a86bd094ba8bb8f2bb92fb49aac5>
- <https://git.kernel.org/stable/c/a5c1bb0fb1bab2f24a081339c145870697f6d220>
- <https://git.kernel.org/stable/c/aa107e3a68f4af177d60f2d87679e7f67179a36c>
- <https://git.kernel.org/stable/c/fca3ebb63e5c82561cd9934365dcc0d068008006>
- <https://git.kernel.org/stable/c/99066cf9bba175f610ceb61a35f6fc9fbc33ff65>
- <https://git.kernel.org/stable/c/8a02ad98798fd01f51f648c1fdd8f3c9d07195d3>
- <https://git.kernel.org/stable/c/832a685efeb5d925ee7d30011d2dbe45f81447a3>
- <https://git.kernel.org/stable/c/7fa3f73f6c8ddc5f0425b50fb2a626a782ef7d12>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-89480>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89480/>. Everything for agents: <https://agentprime.io/llms.txt>.