CVE-2024-36928

Local service crash via stale qeth NAPI pointer

Published May 30, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux s390 qeth driver allows local users to crash an LPAR through traffic on a configured IQD Layer3 device. qeth_free_qdio_queues frees each output queue while its embedded NAPI entry remains linked, leaving a stale poll pointer that later traffic invokes. The interface must already be up when hsuid is first set; a local user can then trigger a full kernel crash without further administrative action.

CVSS severity7.8
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux s390 qeth driver allows local users to crash an LPAR through traffic on a configured IQD Layer3 device. qeth_free_qdio_queues frees each output queue while its embedded NAPI entry remains linked, leaving a stale poll pointer that later traffic invokes. The interface must already be up when hsuid is first set; a local user can then trigger a full kernel crash without further administrative action.

The record

CVE
CVE-2024-36928
Published
May 30, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 30, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=1cfef80d4c2b2c599189f36f36320b205d9447d9 <8a2e4d37afb8500b276e5ee903dee06f50ab0494
  2. Affected versionversion=1cfef80d4c2b2c599189f36f36320b205d9447d9 <e28dd1e1bf3ebb52cdb877fb359e8978a51576e3
  3. Affected versionversion=1cfef80d4c2b2c599189f36f36320b205d9447d9 <eae0aec245712c52a3ce9c05575b541a9eef5282
  4. Affected versionversion=29d6fe395087710280f8e11d4ae79569c4cb14b7
  5. Affected versionversion=5.10.190 <5.11
  6. Affected versionversion=5.15.126 <5.15.159
  7. Affected versionversion=6.1.45 <6.1.91
  8. Affected versionversion=6.4.10 <6.5
  9. Affected versionversion=64e3affee2881bb22df7ce45dd1f1fd7990e382b <8792b557eb50b986f2496156d486d0c7c85a1524
  10. Affected versionversion=6.5
  11. Affected versionversion=86818409f989fee29c38528ed8fb085655603356 <10cb803aff3b11fe0bd5f274fc1c231a43e88df6
  12. Affected versionversion=c33d5a5c5b2c79326190885040f1643793c67b29

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1cfef80d4c2b2c599189f36f36320b205d9447d9 <8a2e4d37afb8500b276e5ee903dee06f50ab0494; version=1cfef80d4c2b2c599189f36f36320b205d9447d9 <e28dd1e1bf3ebb52cdb877fb359e8978a51576e3; version=1cfef80d4c2b2c599189f36f36320b205d9447d9 <eae0aec245712c52a3ce9c05575b541a9eef5282; version=29d6fe395087710280f8e11d4ae79569c4cb14b7; version=5.10.190 <5.11; version=5.15.126 <5.15.159; version=6.1.45 <6.1.91; version=6.4.10 <6.5; version=64e3affee2881bb22df7ce45dd1f1fd7990e382b <8792b557eb50b986f2496156d486d0c7c85a1524; version=6.5; version=86818409f989fee29c38528ed8fb085655603356 <10cb803aff3b11fe0bd5f274fc1c231a43e88df6; version=c33d5a5c5b2c79326190885040f1643793c67b29

Published CVSS scores

4.4Canonical UbuntuCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
7.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

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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