CVE-2024-42155

Protected-key disclosure via unwiped stack copies

Published Jul 30, 2024 · Updated May 11, 2026

Information disclosure in the Linux s390 pkey API from 4.11 through 6.9.8 allows local users to read residual protected or secure key material. The s390 pkey API leaves protected- and secure-key copies on kernel stacks instead of wiping them after use, including after errors. Exploitation requires local high privileges and use of the s390 protected-key interface; the consequence is limited to residual key-copy disclosure.

CVSS severity1.9
Low
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in the Linux s390 pkey API from 4.11 through 6.9.8 allows local users to read residual protected or secure key material. The s390 pkey API leaves protected- and secure-key copies on kernel stacks instead of wiping them after use, including after errors. Exploitation requires local high privileges and use of the s390 protected-key interface; the consequence is limited to residual key-copy disclosure.

The record

CVE
CVE-2024-42155
Published
Jul 30, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jul 30, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=4.11
  2. Affected versionversion=e80d4af0a320972aac58e2004d0ba4e44ef4c5c7 <c746f7ced4ad88ee48d0b6c92710e4674403185b
  3. Affected versionversion=e80d4af0a320972aac58e2004d0ba4e44ef4c5c7 <f2ebdadd85af4f4d0cae1e5d009c70eccc78c207

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=4.11; version=e80d4af0a320972aac58e2004d0ba4e44ef4c5c7 <c746f7ced4ad88ee48d0b6c92710e4674403185b; version=e80d4af0a320972aac58e2004d0ba4e44ef4c5c7 <f2ebdadd85af4f4d0cae1e5d009c70eccc78c207

Published CVSS scores

1.9NIST NVDCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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