CVE-2022-48729

Kernel panic via mis-scaled IPoIB ring indexing

Published Jun 20, 2024 · Updated Aug 5, 2026

Kernel panic in Linux 5.16 through 5.16.7 allows local users to interrupt the host by stopping a tuned IPoIB interface. In hfi1_ipoib_drain_tx_ring, a shift uses the transmit-ring size instead of each queue item's size, producing an invalid ring-item address. The path requires the hfi1 IPoIB driver and an ipoib send_queue_size above its default; reaching interface shutdown requires local privileges.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Kernel panic in Linux 5.16 through 5.16.7 allows local users to interrupt the host by stopping a tuned IPoIB interface. In hfi1_ipoib_drain_tx_ring, a shift uses the transmit-ring size instead of each queue item's size, producing an invalid ring-item address. The path requires the hfi1 IPoIB driver and an ipoib send_queue_size above its default; reaching interface shutdown requires local privileges.

The record

CVE
CVE-2022-48729
Published
Jun 20, 2024
Updated
Aug 5, 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. 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=5.16
  2. Affected versionversion=d47dfc2b00e69001c8eeae71f7e25066ccc36144 <1530d84fba1e459ba55f46aa42649b88773210e7
  3. Affected versionversion=d47dfc2b00e69001c8eeae71f7e25066ccc36144 <8c83d39cc730378bbac64d67a551897b203a606e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.16; version=d47dfc2b00e69001c8eeae71f7e25066ccc36144 <1530d84fba1e459ba55f46aa42649b88773210e7; version=d47dfc2b00e69001c8eeae71f7e25066ccc36144 <8c83d39cc730378bbac64d67a551897b203a606e

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5UbuntuCVSS: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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