CVE-2024-50284Network attack vector

Remote service interruption via unchecked XArray insertion

Published Nov 19, 2024 · Updated Aug 5, 2026

Unchecked return handling in Linux ksmbd allows remote attackers to interrupt SMB service by exhausting memory and RPC handles. ksmbd_session_rpc_open() does not test xa_store() for allocation or invalid-entry errors, leaving the IPC identifier absent from the XArray while leaking the session object, identifier, and RPC pipe. An unauthenticated SMB client reaching IPC$ can repeat named-pipe opens until the service or a memory-constrained host exhausts resources.

CVSS severity7.5
High
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unchecked return handling in Linux ksmbd allows remote attackers to interrupt SMB service by exhausting memory and RPC handles. ksmbd_session_rpc_open() does not test xa_store() for allocation or invalid-entry errors, leaving the IPC identifier absent from the XArray while leaking the session object, identifier, and RPC pipe. An unauthenticated SMB client reaching IPC$ can repeat named-pipe opens until the service or a memory-constrained host exhausts resources.

The record

CVE
CVE-2024-50284
Published
Nov 19, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-754, T1499.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 19, 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=052b41ef2abe274f068e892aee81406f11bd1f3a <d8664ce789bd46290c59a00da6897252f92c237d
  2. Affected versionversion=1f485b54d04a920723984062c912174330a05178
  3. Affected versionversion=5.15.145 <5.16
  4. Affected versionversion=6.1.71 <6.1.117
  5. Affected versionversion=6.3
  6. Affected versionversion=b685757c7b08d5073046fb379be965fd6c06aafc <3abab905b14f4ba756d413f37f1fb02b708eee93
  7. Affected versionversion=b685757c7b08d5073046fb379be965fd6c06aafc <726c1568b9145fa13ee248df184b186c382a7ff8
  8. Affected versionversion=b685757c7b08d5073046fb379be965fd6c06aafc <c2a232c4f790f4bcd4d218904c56ac7a39a448f5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=052b41ef2abe274f068e892aee81406f11bd1f3a <d8664ce789bd46290c59a00da6897252f92c237d; version=1f485b54d04a920723984062c912174330a05178; version=5.15.145 <5.16; version=6.1.71 <6.1.117; version=6.3; version=b685757c7b08d5073046fb379be965fd6c06aafc <3abab905b14f4ba756d413f37f1fb02b708eee93; version=b685757c7b08d5073046fb379be965fd6c06aafc <726c1568b9145fa13ee248df184b186c382a7ff8; version=b685757c7b08d5073046fb379be965fd6c06aafc <c2a232c4f790f4bcd4d218904c56ac7a39a448f5

Published CVSS scores

7.5Linux CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5CISA-ADPCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-754Improper Check for Unusual or Exceptional Conditions
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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