CVE-2022-50136

Kernel crash via premature connection reply event

Published Jun 18, 2025 · Updated Aug 5, 2026

Improper connection-state handling in Linux allows local users to crash the kernel through an incomplete siw RDMA handshake. siw_cm_work_handler reports IW_CM_EVENT_CONNECT_REPLY when siw_recv_mpa_rr returns -EAGAIN for a partial MPA reply, causing iw_cm to process the reply state twice. Exploitation requires low-privileged local access and an active software-iWARP endpoint; the demonstrated consequence is a kernel BUG and host service interruption.

CVSS severity5.5
Medium
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper connection-state handling in Linux allows local users to crash the kernel through an incomplete siw RDMA handshake. siw_cm_work_handler reports IW_CM_EVENT_CONNECT_REPLY when siw_recv_mpa_rr returns -EAGAIN for a partial MPA reply, causing iw_cm to process the reply state twice. Exploitation requires low-privileged local access and an active software-iWARP endpoint; the demonstrated consequence is a kernel BUG and host service interruption.

The record

CVE
CVE-2022-50136
Published
Jun 18, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 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=5.3
  2. Affected versionversion=6c52fdc244b5ccc468006fd65a504d4ee33743c7 <0066246d2d7e2619f3ecf3cf07333c59e6e7d84d
  3. Affected versionversion=6c52fdc244b5ccc468006fd65a504d4ee33743c7 <11edf0bba15ea9df49478affec7974f351bb2f6e
  4. Affected versionversion=6c52fdc244b5ccc468006fd65a504d4ee33743c7 <1434de50a5d9dab91c8ce031bc23b3e2178379c5
  5. Affected versionversion=6c52fdc244b5ccc468006fd65a504d4ee33743c7 <3056fc6c32e613b760422b94c7617ac9a24a4721
  6. Affected versionversion=6c52fdc244b5ccc468006fd65a504d4ee33743c7 <9ade92ddaf2347fb34298c02080caaa3cdd7c27b
  7. Affected versionversion=6c52fdc244b5ccc468006fd65a504d4ee33743c7 <f6e26e1a5f600b760dc32135d3fac846eabe09e7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.3; version=6c52fdc244b5ccc468006fd65a504d4ee33743c7 <0066246d2d7e2619f3ecf3cf07333c59e6e7d84d; version=6c52fdc244b5ccc468006fd65a504d4ee33743c7 <11edf0bba15ea9df49478affec7974f351bb2f6e; version=6c52fdc244b5ccc468006fd65a504d4ee33743c7 <1434de50a5d9dab91c8ce031bc23b3e2178379c5; version=6c52fdc244b5ccc468006fd65a504d4ee33743c7 <3056fc6c32e613b760422b94c7617ac9a24a4721; version=6c52fdc244b5ccc468006fd65a504d4ee33743c7 <9ade92ddaf2347fb34298c02080caaa3cdd7c27b; version=6c52fdc244b5ccc468006fd65a504d4ee33743c7 <f6e26e1a5f600b760dc32135d3fac846eabe09e7

Published CVSS scores

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

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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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

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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