CVE-2024-50136

Service interruption via stale eswitch notifier registration

Published Nov 5, 2024 · Updated May 23, 2026

Improper notifier cleanup in Linux kernel mlx5 eswitch initialization allows local users to interrupt service during repeated SR-IOV setup. The mlx5_eswitch_enable_locked failure path leaves eswitch_vport_event registered in the atomic notifier chain instead of unregistering it before returning. Reaching the fault requires local permission to reconfigure mlx5 SR-IOV after an initialization failure; another enable attempt triggers duplicate-registration warnings and can disrupt kernel 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

Improper notifier cleanup in Linux kernel mlx5 eswitch initialization allows local users to interrupt service during repeated SR-IOV setup. The mlx5_eswitch_enable_locked failure path leaves eswitch_vport_event registered in the atomic notifier chain instead of unregistering it before returning. Reaching the fault requires local permission to reconfigure mlx5 SR-IOV after an initialization failure; another enable attempt triggers duplicate-registration warnings and can disrupt kernel availability.

The record

CVE
CVE-2024-50136
Published
Nov 5, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
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

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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=0aa1e83a20f12e9eaad32f72212ebc7fe0c29c95 <e58fb7ddbab6635191c26dea1af26b91cce00866
  2. Affected versionversion=6.1.60 <6.1.115
  3. Affected versionversion=6.5.9 <6.6
  4. Affected versionversion=6.6
  5. Affected versionversion=7624e58a8b3a251e3e5108b32f2183b34453db32 <1da9cfd6c41c2e6bbe624d0568644e1521c33e12
  6. Affected versionversion=7624e58a8b3a251e3e5108b32f2183b34453db32 <599147722c5778c96292e2fbff4103abbdb45b1f
  7. Affected versionversion=7624e58a8b3a251e3e5108b32f2183b34453db32 <9f2ccb6f3888bec45c00121ee43e4e72423b12c1
  8. Affected versionversion=dc426bd9d813aa5754ce35adaa6f97f0585c06fc

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0aa1e83a20f12e9eaad32f72212ebc7fe0c29c95 <e58fb7ddbab6635191c26dea1af26b91cce00866; version=6.1.60 <6.1.115; version=6.5.9 <6.6; version=6.6; version=7624e58a8b3a251e3e5108b32f2183b34453db32 <1da9cfd6c41c2e6bbe624d0568644e1521c33e12; version=7624e58a8b3a251e3e5108b32f2183b34453db32 <599147722c5778c96292e2fbff4103abbdb45b1f; version=7624e58a8b3a251e3e5108b32f2183b34453db32 <9f2ccb6f3888bec45c00121ee43e4e72423b12c1; version=dc426bd9d813aa5754ce35adaa6f97f0585c06fc

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/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
5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
0.0SUSECVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A: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

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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