CVE-2022-48728

System crash via hfi1 initialization NULL dereference

Published Jun 20, 2024 · Updated May 11, 2026

The Linux kernel hfi1 IPoIB driver contains a NULL pointer dereference that allows local users to crash the system during device initialization. An early failure in hfi1_ipoib_setup_rn invokes hfi1_ipoib_netdev_dtor, which calls hfi1_ipoib_txreq_deinit after initialization routines have already unwound their state. Triggering the panic requires local low-privileged access and Intel Omni-Path hardware using the hfi1 IPoIB path; the documented impact is a host crash.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

The Linux kernel hfi1 IPoIB driver contains a NULL pointer dereference that allows local users to crash the system during device initialization. An early failure in hfi1_ipoib_setup_rn invokes hfi1_ipoib_netdev_dtor, which calls hfi1_ipoib_txreq_deinit after initialization routines have already unwound their state. Triggering the panic requires local low-privileged access and Intel Omni-Path hardware using the hfi1 IPoIB path; the documented impact is a host crash.

The record

CVE
CVE-2022-48728
Published
Jun 20, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 20, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=5.8
  2. Affected versionversion=d99dc602e2a55a99940ba9506a7126dfa54d54ea <1899c3cad265c4583658aed5293d02e8af84276b
  3. Affected versionversion=d99dc602e2a55a99940ba9506a7126dfa54d54ea <4a9bd1e6780fc59f81466ec3489d5ad535a37190
  4. Affected versionversion=d99dc602e2a55a99940ba9506a7126dfa54d54ea <5f8f55b92edd621f056bdf09e572092849fabd83
  5. Affected versionversion=d99dc602e2a55a99940ba9506a7126dfa54d54ea <a3dd4d2682f2a796121609e5f3bbeb1243198c53

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.8; version=d99dc602e2a55a99940ba9506a7126dfa54d54ea <1899c3cad265c4583658aed5293d02e8af84276b; version=d99dc602e2a55a99940ba9506a7126dfa54d54ea <4a9bd1e6780fc59f81466ec3489d5ad535a37190; version=d99dc602e2a55a99940ba9506a7126dfa54d54ea <5f8f55b92edd621f056bdf09e572092849fabd83; version=d99dc602e2a55a99940ba9506a7126dfa54d54ea <a3dd4d2682f2a796121609e5f3bbeb1243198c53

Published CVSS scores

5.5CanonicalCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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