# nvme-tcp: check the data direction of a C2HData PDU

CVE record · `CVE-2026-89973`

- **Identifiers:** `CVE-2026-89973`
- **State:** Confirmed
- **Severity:** CVSS 8.2 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 16 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 16 Sept 2026, 10:32 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 df74950ba6008655d4a977d17df7faf4b6e52b74` (git)
  - affected: `3f2304f8c6d6ed97849057bd16fee99e434ca796 to before 980d990f3c0560d7dfbfbf14699651fdf02f26ee` (git)
  - affected: `3f2304f8c6d6ed97849057bd16fee99e434ca796 to before 5b115d932f6e769ac80783fb18edd21b0aed256e` (git)
  - affected: `3f2304f8c6d6ed97849057bd16fee99e434ca796 to before 0673a2affe45ca76b60de31a83c67b1e60f81bde` (git)
  - affected: `3f2304f8c6d6ed97849057bd16fee99e434ca796 to before 80d56202fbdff8906be6954b2776e5c14a4026f2` (git)
  - affected: `3f2304f8c6d6ed97849057bd16fee99e434ca796 to before b4af7999a998787d5eb6facb5a333e04a4f1d2d9` (git)
  - affected: `3f2304f8c6d6ed97849057bd16fee99e434ca796 to before a0c389b8a495bda1eb719d2503853c924b7a8355` (git)
  - affected: `3f2304f8c6d6ed97849057bd16fee99e434ca796 to before f83af377c148f6ad94b41c0e8313f12adf45e1c1` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.0`
  - unaffected: `before 5.0` (semver)
  - unaffected: `5.10.270 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: `6.12.110 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.51 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.5 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0062, the 50th percentile, on 13 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 16 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89973](https://www.cve.org/CVERecord?id=CVE-2026-89973)
- [NVD: CVE-2026-89973](https://nvd.nist.gov/vuln/detail/CVE-2026-89973)

### References from the CNA

- <https://git.kernel.org/stable/c/df74950ba6008655d4a977d17df7faf4b6e52b74>
- <https://git.kernel.org/stable/c/980d990f3c0560d7dfbfbf14699651fdf02f26ee>
- <https://git.kernel.org/stable/c/5b115d932f6e769ac80783fb18edd21b0aed256e>
- <https://git.kernel.org/stable/c/0673a2affe45ca76b60de31a83c67b1e60f81bde>
- <https://git.kernel.org/stable/c/80d56202fbdff8906be6954b2776e5c14a4026f2>
- <https://git.kernel.org/stable/c/b4af7999a998787d5eb6facb5a333e04a4f1d2d9>
- <https://git.kernel.org/stable/c/a0c389b8a495bda1eb719d2503853c924b7a8355>
- <https://git.kernel.org/stable/c/f83af377c148f6ad94b41c0e8313f12adf45e1c1>

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-2026-89973>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89973/>. Everything for agents: <https://agentprime.io/llms.txt>.