# RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event()

CVE record · `CVE-2026-46181`

- **Identifiers:** `CVE-2026-46181`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Weakness (CWE):** [CWE-366](https://cwe.mitre.org/data/definitions/366.html)
- **Tags:** [CWE-366](https://agentprime.io/advisories/tag/cwe-366.md)
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 28 May 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 28 May 2026, 09:36 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: `30353bfc43a1602c020f31d95cf27182ffd23824 to before 654aeddbc6e0f6e56531985bb12328ab4230c6c1` (git)
  - affected: `30353bfc43a1602c020f31d95cf27182ffd23824 to before 2d8b30b496bc53e961ba7415fd629fc27813017c` (git)
  - affected: `30353bfc43a1602c020f31d95cf27182ffd23824 to before f0dbd9355ce1e93808541260c7ffab7956df9233` (git)
  - affected: `30353bfc43a1602c020f31d95cf27182ffd23824 to before 1e2a44875b6afb4add1115f7f3351dcbeb6f273d` (git)
  - affected: `30353bfc43a1602c020f31d95cf27182ffd23824 to before 8b7833f3bce35cb0d01c1503781523c099c675f0` (git)
  - affected: `30353bfc43a1602c020f31d95cf27182ffd23824 to before c9341307ea16b9395c2e4c9c94d8499d91fe31d0` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.9`
  - unaffected: `before 4.9` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.114 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.30 to 6.18.*, inclusive` (semver)
  - unaffected: `7.0.7 to 7.0.*, inclusive` (semver)
  - unaffected: `7.1 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) (used for this record)
- 7.0 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`, from ADP (redhat-SADP)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0014, the 3rd percentile, on 5 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 28 May 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-46181](https://www.cve.org/CVERecord?id=CVE-2026-46181)
- [NVD: CVE-2026-46181](https://nvd.nist.gov/vuln/detail/CVE-2026-46181)

### References from the CNA

- <https://git.kernel.org/stable/c/654aeddbc6e0f6e56531985bb12328ab4230c6c1>
- <https://git.kernel.org/stable/c/2d8b30b496bc53e961ba7415fd629fc27813017c>
- <https://git.kernel.org/stable/c/f0dbd9355ce1e93808541260c7ffab7956df9233>
- <https://git.kernel.org/stable/c/1e2a44875b6afb4add1115f7f3351dcbeb6f273d>
- <https://git.kernel.org/stable/c/8b7833f3bce35cb0d01c1503781523c099c675f0>
- <https://git.kernel.org/stable/c/c9341307ea16b9395c2e4c9c94d8499d91fe31d0>

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-2026-46181>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

---

The web page: <https://agentprime.io/advisories/CVE-2026-46181/>. Everything for agents: <https://agentprime.io/llms.txt>.