CVE-2022-48694Network attack vector

Remote service hang via misdirected RDMA completions

Published May 3, 2024 · Updated Aug 5, 2026

Denial of service in the Linux irdma driver 5.19 through 5.19.8 allows remote attackers to hang an RDMA kernel worker. irdma_generate_flush_completions calls irdma_comp_handler with the receive CQ for outstanding send WRs, so ib_drain_sq waits indefinitely on the unsignaled send CQ. An affected host must use Intel irdma hardware with a kernel RDMA service whose connection enters an error or disconnect path; the resulting blocked worker interrupts that RDMA work path.

CVSS severity7.5
High
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux irdma driver 5.19 through 5.19.8 allows remote attackers to hang an RDMA kernel worker. irdma_generate_flush_completions calls irdma_comp_handler with the receive CQ for outstanding send WRs, so ib_drain_sq waits indefinitely on the unsignaled send CQ. An affected host must use Intel irdma hardware with a kernel RDMA service whose connection enters an error or disconnect path; the resulting blocked worker interrupts that RDMA work path.

The record

CVE
CVE-2022-48694
Published
May 3, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 3, 2024CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=5.19
  2. Affected versionversion=81091d7696ae71627ff80bbf2c6b0986d2c1cce3 <5becc531a3fa8da75158a8993f56cc3e0717716e
  3. Affected versionversion=81091d7696ae71627ff80bbf2c6b0986d2c1cce3 <ead54ced6321099978d30d62dc49c282a6e70574
  4. Affected versionversion=bd2af69575f518a34a941b6b46882c7e2f43e8a2 <14d148401c5202fec3a071e24785481d540b22c3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=81091d7696ae71627ff80bbf2c6b0986d2c1cce3 <5becc531a3fa8da75158a8993f56cc3e0717716e; version=81091d7696ae71627ff80bbf2c6b0986d2c1cce3 <ead54ced6321099978d30d62dc49c282a6e70574; version=bd2af69575f518a34a941b6b46882c7e2f43e8a2 <14d148401c5202fec3a071e24785481d540b22c3

Published CVSS scores

7.5Linux Kernel CVE TeamCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

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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