CVE-2024-57791Network attack vector

Remote service hang via oversized CLC length

Published Jan 11, 2025 · Updated Aug 5, 2026

Denial of service in the Linux SMC networking component allows remote attackers to hang a connection via a crafted CLC message. smc_clc_wait_msg trusts the header length and repeatedly calls sock_recvmsg to drain bytes beyond its buffer without stopping when the peer closes. The unauthenticated CLC exchange must reach an SMC listener or client, after which the dead loop interrupts availability without reported data access or modification.

CVSS severity7.5
High
EPSS probability0.77%
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 SMC networking component allows remote attackers to hang a connection via a crafted CLC message. smc_clc_wait_msg trusts the header length and repeatedly calls sock_recvmsg to drain bytes beyond its buffer without stopping when the peer closes. The unauthenticated CLC exchange must reach an SMC listener or client, after which the dead loop interrupts availability without reported data access or modification.

The record

CVE
CVE-2024-57791
Published
Jan 11, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 11, 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

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=5.8
  2. Affected versionversion=fb4f79264c0fc6fd5a68ffe3e31bfff97311e1f1 <6b80924af6216277892d5f091f5bfc7d1265fa28
  3. Affected versionversion=fb4f79264c0fc6fd5a68ffe3e31bfff97311e1f1 <7a6927814b4256d603e202ae7c5e38db3b338896
  4. Affected versionversion=fb4f79264c0fc6fd5a68ffe3e31bfff97311e1f1 <82c7ad9ca09975aae737abffd66d1ad98874c13d
  5. Affected versionversion=fb4f79264c0fc6fd5a68ffe3e31bfff97311e1f1 <c5b8ee5022a19464783058dc6042e8eefa34e8cd
  6. Affected versionversion=fb4f79264c0fc6fd5a68ffe3e31bfff97311e1f1 <d7d1f986ebb284b1db8dafca7d1bdb6dd2445cf6
  7. Affected versionversion=fb4f79264c0fc6fd5a68ffe3e31bfff97311e1f1 <df3dfe1a93c6298d8c09a18e4fba19ef5b17763b

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.8; version=fb4f79264c0fc6fd5a68ffe3e31bfff97311e1f1 <6b80924af6216277892d5f091f5bfc7d1265fa28; version=fb4f79264c0fc6fd5a68ffe3e31bfff97311e1f1 <7a6927814b4256d603e202ae7c5e38db3b338896; version=fb4f79264c0fc6fd5a68ffe3e31bfff97311e1f1 <82c7ad9ca09975aae737abffd66d1ad98874c13d; version=fb4f79264c0fc6fd5a68ffe3e31bfff97311e1f1 <c5b8ee5022a19464783058dc6042e8eefa34e8cd; version=fb4f79264c0fc6fd5a68ffe3e31bfff97311e1f1 <d7d1f986ebb284b1db8dafca7d1bdb6dd2445cf6; version=fb4f79264c0fc6fd5a68ffe3e31bfff97311e1f1 <df3dfe1a93c6298d8c09a18e4fba19ef5b17763b

Published CVSS scores

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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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