CVE-2024-42229

Private-key disclosure via uncleared temporary buffers

Published Jul 30, 2024 · Updated May 11, 2026

Information disclosure in the Linux kernel allows local users to recover private-key material from reused kernel memory buffers. The unaligned-key paths in crypto/aead.c and crypto/cipher.c free aligned temporary key buffers without first zeroing their contents. High privileges and favorable memory-reuse conditions are required, and the reported consequence is limited to disclosure of residual private-key material.

CVSS severity4.1
Medium
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

Information disclosure in the Linux kernel allows local users to recover private-key material from reused kernel memory buffers. The unaligned-key paths in crypto/aead.c and crypto/cipher.c free aligned temporary key buffers without first zeroing their contents. High privileges and favorable memory-reuse conditions are required, and the reported consequence is limited to disclosure of residual private-key material.

The record

CVE
CVE-2024-42229
Published
Jul 30, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1552.004
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=06817176784f620984200dc5d7cbe16984f7b262 <23e4099bdc3c8381992f9eb975c79196d6755210
  2. Affected versionversion=06817176784f620984200dc5d7cbe16984f7b262 <28c8d274848feba552e95c5c2a7e3cfe8f15c534
  3. Affected versionversion=06817176784f620984200dc5d7cbe16984f7b262 <71dd428615375e36523f4d4f7685ddd54113646d
  4. Affected versionversion=06817176784f620984200dc5d7cbe16984f7b262 <89b9b6fa4463daf820e6a5ef65c3b0c2db239513
  5. Affected versionversion=06817176784f620984200dc5d7cbe16984f7b262 <9db8c299a521813630fcb4154298cb60c37f3133
  6. Affected versionversion=06817176784f620984200dc5d7cbe16984f7b262 <b502d4a08875ea2b4ea5d5b28dc7c991c8b90cfb
  7. Affected versionversion=06817176784f620984200dc5d7cbe16984f7b262 <b716e9c3603ee95ed45e938fe47227d22cf3ec35
  8. Affected versionversion=06817176784f620984200dc5d7cbe16984f7b262 <f58679996a831754a356974376f248aa0af2eb8e
  9. Affected versionversion=2.6.23

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=06817176784f620984200dc5d7cbe16984f7b262 <23e4099bdc3c8381992f9eb975c79196d6755210; version=06817176784f620984200dc5d7cbe16984f7b262 <28c8d274848feba552e95c5c2a7e3cfe8f15c534; version=06817176784f620984200dc5d7cbe16984f7b262 <71dd428615375e36523f4d4f7685ddd54113646d; version=06817176784f620984200dc5d7cbe16984f7b262 <89b9b6fa4463daf820e6a5ef65c3b0c2db239513; version=06817176784f620984200dc5d7cbe16984f7b262 <9db8c299a521813630fcb4154298cb60c37f3133; version=06817176784f620984200dc5d7cbe16984f7b262 <b502d4a08875ea2b4ea5d5b28dc7c991c8b90cfb; version=06817176784f620984200dc5d7cbe16984f7b262 <b716e9c3603ee95ed45e938fe47227d22cf3ec35; version=06817176784f620984200dc5d7cbe16984f7b262 <f58679996a831754a356974376f248aa0af2eb8e; version=2.6.23

Published CVSS scores

4.1NIST NVDCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1552.004Private Keys

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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