CVE-2026-72308

Service interruption via leaked mlxsw LAG references

Published Aug 15, 2026 · Updated Aug 15, 2026

Resource leak in the mlxsw driver in Linux allows local users to interrupt service by triggering repeated failed LAG joins. In mlxsw_sp_port_lag_join(), failure of mlxsw_sp_port_lag_index_get() returns without passing through mlxsw_sp_lag_put(), retaining the reference acquired by mlxsw_sp_lag_get(). The path requires local privileges and an mlxsw-managed switch port, and published material does not specify whether exhaustion causes a hang or crash.

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

Resource leak in the mlxsw driver in Linux allows local users to interrupt service by triggering repeated failed LAG joins. In mlxsw_sp_port_lag_join(), failure of mlxsw_sp_port_lag_index_get() returns without passing through mlxsw_sp_lag_put(), retaining the reference acquired by mlxsw_sp_lag_get(). The path requires local privileges and an mlxsw-managed switch port, and published material does not specify whether exhaustion causes a hang or crash.

The record

CVE
CVE-2026-72308
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=0d65fc13042fce6a2d6de58ff0dc9531e8523c07 <1cf8a1af42b1f12a30b7abd34fe4fc23b3170e7e
  2. Affected versionversion=0d65fc13042fce6a2d6de58ff0dc9531e8523c07 <2d8b3c3e129973a51ae924bdcf6993a76b828814
  3. Affected versionversion=0d65fc13042fce6a2d6de58ff0dc9531e8523c07 <41c8c1d65b32beacd8d916a22457b4f6e47f45af
  4. Affected versionversion=0d65fc13042fce6a2d6de58ff0dc9531e8523c07 <8b3350eacd9df0597bfe36a594df7b9def0b3edf
  5. Affected versionversion=0d65fc13042fce6a2d6de58ff0dc9531e8523c07 <cab468c3c03f4bcd7530ce2783a4140da14efb7b
  6. Affected versionversion=4.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0d65fc13042fce6a2d6de58ff0dc9531e8523c07 <1cf8a1af42b1f12a30b7abd34fe4fc23b3170e7e; version=0d65fc13042fce6a2d6de58ff0dc9531e8523c07 <2d8b3c3e129973a51ae924bdcf6993a76b828814; version=0d65fc13042fce6a2d6de58ff0dc9531e8523c07 <41c8c1d65b32beacd8d916a22457b4f6e47f45af; version=0d65fc13042fce6a2d6de58ff0dc9531e8523c07 <8b3350eacd9df0597bfe36a594df7b9def0b3edf; version=0d65fc13042fce6a2d6de58ff0dc9531e8523c07 <cab468c3c03f4bcd7530ce2783a4140da14efb7b; version=4.5

Published CVSS scores

5.5Oracle LinuxCVSS: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.

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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.

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Technologies

Your stack

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Your stack

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