CVE-2024-36906

Kernel crash via stale KASAN stack poison

Published May 30, 2024 · Updated May 11, 2026

Out-of-bounds write in Linux kernel 5.11 through 6.9-rc7 on ARM allows local users to trigger a kernel crash during CPU idle transitions. KASAN-instrumented calls on the cpuidle exit path leave stack-shadow bytes poisoned when a CPU loses context, and the cold return path restores an older stack without clearing them. Reachability requires ARM, KASAN stack instrumentation, and a context-losing idle path; the reported result is a spurious KASAN console splat.

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

Out-of-bounds write in Linux kernel 5.11 through 6.9-rc7 on ARM allows local users to trigger a kernel crash during CPU idle transitions. KASAN-instrumented calls on the cpuidle exit path leave stack-shadow bytes poisoned when a CPU loses context, and the cold return path restores an older stack without clearing them. Reachability requires ARM, KASAN stack instrumentation, and a context-losing idle path; the reported result is a spurious KASAN console splat.

The record

CVE
CVE-2024-36906
Published
May 30, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 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=5.11
  2. Affected versionversion=5615f69bc2097452ecc954f5264d784e158d6801 <20ac71bee028ffbae4fc14ed679b23b4d3e95726
  3. Affected versionversion=5615f69bc2097452ecc954f5264d784e158d6801 <ad702338fe423cb1e79745787090317256a98dab
  4. Affected versionversion=5615f69bc2097452ecc954f5264d784e158d6801 <b26f353786d365e658cebc9a9ace88e04fc2325e
  5. Affected versionversion=5615f69bc2097452ecc954f5264d784e158d6801 <c4238686f9093b98bd6245a348bcf059cdce23af
  6. Affected versionversion=5615f69bc2097452ecc954f5264d784e158d6801 <ee0ce7573e5083031960faf602c9db693ab5b477

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.11; version=5615f69bc2097452ecc954f5264d784e158d6801 <20ac71bee028ffbae4fc14ed679b23b4d3e95726; version=5615f69bc2097452ecc954f5264d784e158d6801 <ad702338fe423cb1e79745787090317256a98dab; version=5615f69bc2097452ecc954f5264d784e158d6801 <b26f353786d365e658cebc9a9ace88e04fc2325e; version=5615f69bc2097452ecc954f5264d784e158d6801 <c4238686f9093b98bd6245a348bcf059cdce23af; version=5615f69bc2097452ecc954f5264d784e158d6801 <ee0ce7573e5083031960faf602c9db693ab5b477

Published CVSS scores

7.8NIST NVDCVSS: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

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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-787Out-of-bounds Write

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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