CVE-2024-50120

Service interruption via unchecked password allocation

Published Nov 5, 2024 · Updated May 23, 2026

Denial of service in the Linux kernel SMB client allows local users to interrupt service through password allocation failure during remount. smb3_reconfigure() assigns unchecked kstrdup() results to session password fields, leaving NULL pointers when memory allocation fails. The affected path is reached while changing an SMB password during remount, and the documented consequence is limited to availability.

CVSS severity5.5
Medium
EPSS probability0.22%
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 kernel SMB client allows local users to interrupt service through password allocation failure during remount. smb3_reconfigure() assigns unchecked kstrdup() results to session password fields, leaving NULL pointers when memory allocation fails. The affected path is reached while changing an SMB password during remount, and the documented consequence is limited to availability.

The record

CVE
CVE-2024-50120
Published
Nov 5, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 5, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=2a0fc63f1f4fccfeb367d0c57b8a243cec60c26c
  2. Affected versionversion=6.6.24 <6.6.59
  3. Affected versionversion=6.7.12 <6.8
  4. Affected versionversion=6.8.3 <6.9
  5. Affected versionversion=6.9
  6. Affected versionversion=7e8cffa4f85e6839335d75e6b47f918d90c1d194 <35dbac8c328d6afe937cd45ecd41d209d0b9f8b8
  7. Affected versionversion=c1eb537bf4560b3ad4df606c266c665624f3b502 <35488799b0ab6e4327f82e1d9209a60805665b37
  8. Affected versionversion=c1eb537bf4560b3ad4df606c266c665624f3b502 <9a5dd61151399ad5a5d69aad28ab164734c1e3bc
  9. Affected versionversion=e78308a6dcab1e53b38b8dd952e69c515cd324d7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2a0fc63f1f4fccfeb367d0c57b8a243cec60c26c; version=6.6.24 <6.6.59; version=6.7.12 <6.8; version=6.8.3 <6.9; version=6.9; version=7e8cffa4f85e6839335d75e6b47f918d90c1d194 <35dbac8c328d6afe937cd45ecd41d209d0b9f8b8; version=c1eb537bf4560b3ad4df606c266c665624f3b502 <35488799b0ab6e4327f82e1d9209a60805665b37; version=c1eb537bf4560b3ad4df606c266c665624f3b502 <9a5dd61151399ad5a5d69aad28ab164734c1e3bc; version=e78308a6dcab1e53b38b8dd952e69c515cd324d7

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.5SUSECVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.0SUSECVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application 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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