CVE-2026-72058

Service interruption via duplicate HDLC netdev allocation

Published Aug 15, 2026 · Updated Aug 15, 2026

Resource leak in the Linux ixp4xx_hss network driver allows local users to interrupt service by exhausting memory during device probing. ixp4xx_hss_probe() allocates two HDLC network devices, registers the first, but stores the second for later unregistration and freeing, leaving the registered allocation unreleased. Exploitation requires low-privileged local access and an Intel IXP4xx HSS device that reaches the affected probe path; the consequence is bounded to availability loss.

CVSS severity5.5
Medium
EPSS probability0.21%
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 Linux ixp4xx_hss network driver allows local users to interrupt service by exhausting memory during device probing. ixp4xx_hss_probe() allocates two HDLC network devices, registers the first, but stores the second for later unregistration and freeing, leaving the registered allocation unreleased. Exploitation requires low-privileged local access and an Intel IXP4xx HSS device that reaches the affected probe path; the consequence is bounded to availability loss.

The record

CVE
CVE-2026-72058
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-772, 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=5.14
  2. Affected versionversion=99ebe65eb9c0ada015931d239d9f2d1dc8897fee <3f85fcd520aa703824b1958f35169925ddae2558
  3. Affected versionversion=99ebe65eb9c0ada015931d239d9f2d1dc8897fee <8f4c3c384092becbf4835a3f8ed8a3df1f544578
  4. Affected versionversion=99ebe65eb9c0ada015931d239d9f2d1dc8897fee <91850f582783098415a334f8bd0a84c87ff15a8c
  5. Affected versionversion=99ebe65eb9c0ada015931d239d9f2d1dc8897fee <db818b0e8af7bac16860116a19c341a63d6677b4
  6. Affected versionversion=99ebe65eb9c0ada015931d239d9f2d1dc8897fee <fd0b939ebd1eee29945a539c5ed65c35dddac8d6
  7. Affected versionversion=99ebe65eb9c0ada015931d239d9f2d1dc8897fee <ffba16e6f55948d94b7f16aa113d587c1c4c0643

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.14; version=99ebe65eb9c0ada015931d239d9f2d1dc8897fee <3f85fcd520aa703824b1958f35169925ddae2558; version=99ebe65eb9c0ada015931d239d9f2d1dc8897fee <8f4c3c384092becbf4835a3f8ed8a3df1f544578; version=99ebe65eb9c0ada015931d239d9f2d1dc8897fee <91850f582783098415a334f8bd0a84c87ff15a8c; version=99ebe65eb9c0ada015931d239d9f2d1dc8897fee <db818b0e8af7bac16860116a19c341a63d6677b4; version=99ebe65eb9c0ada015931d239d9f2d1dc8897fee <fd0b939ebd1eee29945a539c5ed65c35dddac8d6; version=99ebe65eb9c0ada015931d239d9f2d1dc8897fee <ffba16e6f55948d94b7f16aa113d587c1c4c0643

Published CVSS scores

5.5Red HatCVSS: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
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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