# RDMA/mlx5: Fix integer overflow of user QP buffer size

CVE record · `CVE-2026-90435`

- **Identifiers:** `CVE-2026-90435`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:09 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: `e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c to before ccce6b7ef1d7efc59ccba3421e1339c6e63a3d20` (git)
  - affected: `e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c to before d99622e40aaa910ade681dfd4dc0fa240a011331` (git)
  - affected: `e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c to before c845e5e05140ea1bc64a5b1107942d93c876034d` (git)
  - affected: `e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c to before 42fb8aefffff5b458aaa66803364a16e0ea44129` (git)
  - affected: `e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c to before d7fa2ff72ad1861eac194a4e0075d504ba8c246e` (git)
  - affected: `e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c to before 5b6cfc6d7ff0959dd9766fdc24286a253b59ca77` (git)
  - affected: `e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c to before f917707f0de0832b8ab582391b1f64e549995c6c` (git)
  - affected: `e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c to before dec47e4b0fe34afdf38caa72b4408ba95502e5de` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `3.11`
  - unaffected: `before 3.11` (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: `6.18.52 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.6 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0013, the 2nd 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 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-90435](https://www.cve.org/CVERecord?id=CVE-2026-90435)
- [NVD: CVE-2026-90435](https://nvd.nist.gov/vuln/detail/CVE-2026-90435)

### References from the CNA

- <https://git.kernel.org/stable/c/ccce6b7ef1d7efc59ccba3421e1339c6e63a3d20>
- <https://git.kernel.org/stable/c/d99622e40aaa910ade681dfd4dc0fa240a011331>
- <https://git.kernel.org/stable/c/c845e5e05140ea1bc64a5b1107942d93c876034d>
- <https://git.kernel.org/stable/c/42fb8aefffff5b458aaa66803364a16e0ea44129>
- <https://git.kernel.org/stable/c/d7fa2ff72ad1861eac194a4e0075d504ba8c246e>
- <https://git.kernel.org/stable/c/5b6cfc6d7ff0959dd9766fdc24286a253b59ca77>
- <https://git.kernel.org/stable/c/f917707f0de0832b8ab582391b1f64e549995c6c>
- <https://git.kernel.org/stable/c/dec47e4b0fe34afdf38caa72b4408ba95502e5de>

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-2026-90435>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90435/>. Everything for agents: <https://agentprime.io/llms.txt>.