CVE-2024-42145Network attack vector

Service interruption via unbounded UMAD receive queue

Published Jul 30, 2024 · Updated Aug 5, 2026

Resource exhaustion in the Linux kernel's ib_umad interface allows remote attackers to interrupt service via excessive MAD traffic. The receive path in drivers/infiniband/core/user_mad.c appends received MAD packets to a list without limiting its size when userspace drains packets more slowly than they arrive. Exposure requires an active userspace MAD consumer and incoming management traffic; sustained queue growth can exhaust memory and interrupt the host.

CVSS severity7.5
High
EPSS probability0.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in the Linux kernel's ib_umad interface allows remote attackers to interrupt service via excessive MAD traffic. The receive path in drivers/infiniband/core/user_mad.c appends received MAD packets to a list without limiting its size when userspace drains packets more slowly than they arrive. Exposure requires an active userspace MAD consumer and incoming management traffic; sustained queue growth can exhaust memory and interrupt the host.

The record

CVE
CVE-2024-42145
Published
Jul 30, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-770, T1499.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 30, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1288cf1cceb0e6df276e182f5412370fb4169bcb
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <62349fbf86b5e13b02721bdadf98c29afd1e7b5f
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <63d202d948bb6d3a28cd8e8b96b160fa53e18baa
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a6627fba793cc75b7365d9504a0095fb2902dda4
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b4913702419d064ec4c4bbf7270643c95cc89a1b
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b8c5f635997f49c625178d1a0cb32a80ed33abe6
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ca0b44e20a6f3032224599f02e7c8fb49525c894
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d73cb8862e4d6760ccc94d3b57b9ef6271400607
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1288cf1cceb0e6df276e182f5412370fb4169bcb; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <62349fbf86b5e13b02721bdadf98c29afd1e7b5f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <63d202d948bb6d3a28cd8e8b96b160fa53e18baa; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a6627fba793cc75b7365d9504a0095fb2902dda4; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b4913702419d064ec4c4bbf7270643c95cc89a1b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b8c5f635997f49c625178d1a0cb32a80ed33abe6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ca0b44e20a6f3032224599f02e7c8fb49525c894; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d73cb8862e4d6760ccc94d3b57b9ef6271400607; version=2.6.12

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.5kernel.orgCVSS:3.1/AV:N/AC:L/PR:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.002Service Exhaustion Flood

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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