CVE-2025-22086

Kernel crash via mismatched RDMA QP comparison

Published Apr 16, 2025 · Updated Aug 5, 2026

NULL pointer dereference in Linux RDMA/mlx5 3.11 and later allows local users to crash the kernel through completion queue polling. mlx5_poll_one compares a firmware-supplied CQE QP number with mlx5_ib_qp rather than mlx5_core_qp, so it can retain the wrong cur_qp while handling a CQE. Reachability requires low-privileged local access and an active mlx5 RDMA configuration, especially management QPs 0 or 1; the demonstrated consequence is an availability-only kernel oops.

CVSS severity5.5
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux RDMA/mlx5 3.11 and later allows local users to crash the kernel through completion queue polling. mlx5_poll_one compares a firmware-supplied CQE QP number with mlx5_ib_qp rather than mlx5_core_qp, so it can retain the wrong cur_qp while handling a CQE. Reachability requires low-privileged local access and an active mlx5 RDMA configuration, especially management QPs 0 or 1; the demonstrated consequence is an availability-only kernel oops.

The record

CVE
CVE-2025-22086
Published
Apr 16, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.11
  2. Affected versionversion=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <3b97d77049856865ac5ce8ffbc6e716928310f7f
  3. Affected versionversion=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <55c65a64aefa6267b964d90e9a4039cb68ec73a5
  4. Affected versionversion=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <5ed3b0cb3f827072e93b4c5b6e2b8106fd7cccbd
  5. Affected versionversion=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <7c51a6964b45b6d40027abd77e89cef30d26dc5a
  6. Affected versionversion=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <856d9e5d72dc44eca6d5a153581c58fbd84e92e1
  7. Affected versionversion=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <cad677085274ecf9c7565b5bfc5d2e49acbf174c
  8. Affected versionversion=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <d52636eb13ccba448a752964cc6fc49970912874
  9. Affected versionversion=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <dc7139b7031d877acd73d7eff55670f22f48cd5e
  10. Affected versionversion=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <f0447ceb8a31d79bee7144f98f9a13f765531e1a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.11; version=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <3b97d77049856865ac5ce8ffbc6e716928310f7f; version=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <55c65a64aefa6267b964d90e9a4039cb68ec73a5; version=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <5ed3b0cb3f827072e93b4c5b6e2b8106fd7cccbd; version=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <7c51a6964b45b6d40027abd77e89cef30d26dc5a; version=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <856d9e5d72dc44eca6d5a153581c58fbd84e92e1; version=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <cad677085274ecf9c7565b5bfc5d2e49acbf174c; version=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <d52636eb13ccba448a752964cc6fc49970912874; version=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <dc7139b7031d877acd73d7eff55670f22f48cd5e; version=e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c <f0447ceb8a31d79bee7144f98f9a13f765531e1a

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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