CVE-2026-72087

Local denial of service via leaked mailbox buffers

Published Aug 15, 2026 · Updated Aug 15, 2026

Memory leak in the lpfc SCSI driver in Linux allows local users to exhaust kernel memory and interrupt service during device setup. The lpfc_sli4_driver_resource_setup() function allocates mboxq with mempool_alloc() but omits mempool_free() on early error exits after the buffer's last use. Reaching the faulty initialization path requires local low-privileged access and an lpfc-backed SCSI environment; repeated failures deplete kernel memory.

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

Memory leak in the lpfc SCSI driver in Linux allows local users to exhaust kernel memory and interrupt service during device setup. The lpfc_sli4_driver_resource_setup() function allocates mboxq with mempool_alloc() but omits mempool_free() on early error exits after the buffer's last use. Reaching the faulty initialization path requires local low-privileged access and an lpfc-backed SCSI environment; repeated failures deplete kernel memory.

The record

CVE
CVE-2026-72087
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-772, T1499
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=5.4
  2. Affected versionversion=d79c9e9d4b3d9330ee38f392a7c98e0fc494f7f8 <0ce5a37f7ddf2fc12210e8700350274da79fbb3a
  3. Affected versionversion=d79c9e9d4b3d9330ee38f392a7c98e0fc494f7f8 <1bd28625e25be549ee7c47532e7c3ef91c682410
  4. Affected versionversion=d79c9e9d4b3d9330ee38f392a7c98e0fc494f7f8 <25cac8a302626f59ca84fa3339e2506c3ac761bc
  5. Affected versionversion=d79c9e9d4b3d9330ee38f392a7c98e0fc494f7f8 <299f5baa1321a0951cc3ebbacc72b67433a65391
  6. Affected versionversion=d79c9e9d4b3d9330ee38f392a7c98e0fc494f7f8 <c3f4e407661542d1d284fc889cf9f27afd11b3d3
  7. Affected versionversion=d79c9e9d4b3d9330ee38f392a7c98e0fc494f7f8 <ed08497977820e002a62cb114440f365cc7a087f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.4; version=d79c9e9d4b3d9330ee38f392a7c98e0fc494f7f8 <0ce5a37f7ddf2fc12210e8700350274da79fbb3a; version=d79c9e9d4b3d9330ee38f392a7c98e0fc494f7f8 <1bd28625e25be549ee7c47532e7c3ef91c682410; version=d79c9e9d4b3d9330ee38f392a7c98e0fc494f7f8 <25cac8a302626f59ca84fa3339e2506c3ac761bc; version=d79c9e9d4b3d9330ee38f392a7c98e0fc494f7f8 <299f5baa1321a0951cc3ebbacc72b67433a65391; version=d79c9e9d4b3d9330ee38f392a7c98e0fc494f7f8 <c3f4e407661542d1d284fc889cf9f27afd11b3d3; version=d79c9e9d4b3d9330ee38f392a7c98e0fc494f7f8 <ed08497977820e002a62cb114440f365cc7a087f

Published CVSS scores

5.5OracleCVSS: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

CWE-772Missing Release of Resource after Effective Lifetime
T1499Endpoint Denial of Service

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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