CVE-2024-26850

Kernel startup crash via non-devmap PUD test entries

Published Apr 17, 2024 · Updated May 11, 2026

Denial of service in Linux 6.6 through 6.7.8 and 6.8 release candidates allows local users to crash a CONFIG_DEBUG_VM powerpc kernel. The pud_advanced_tests function creates ordinary PUD entries, then passes them to powerpc huge-page helpers whose debug checks accept only devmap entries. The failure occurs during the initialization self-test only on affected powerpc builds with CONFIG_DEBUG_VM, producing a warning or kernel BUG that interrupts startup.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux 6.6 through 6.7.8 and 6.8 release candidates allows local users to crash a CONFIG_DEBUG_VM powerpc kernel. The pud_advanced_tests function creates ordinary PUD entries, then passes them to powerpc huge-page helpers whose debug checks accept only devmap entries. The failure occurs during the initialization self-test only on affected powerpc builds with CONFIG_DEBUG_VM, producing a warning or kernel BUG that interrupts startup.

The record

CVE
CVE-2024-26850
Published
Apr 17, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 17, 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=27af67f35631ac4b61b5e4455b44c9aee8d2cc4b <720da1e593b85a550593b415bf1d79a053133451
  2. Affected versionversion=27af67f35631ac4b61b5e4455b44c9aee8d2cc4b <d2a9510c0e39d06f5544075c13040407bdbf2803
  3. Affected versionversion=27af67f35631ac4b61b5e4455b44c9aee8d2cc4b <eeeddf85fc58d48c58ad916e4ca12363ebd8ab21
  4. Affected versionversion=6.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=27af67f35631ac4b61b5e4455b44c9aee8d2cc4b <720da1e593b85a550593b415bf1d79a053133451; version=27af67f35631ac4b61b5e4455b44c9aee8d2cc4b <d2a9510c0e39d06f5544075c13040407bdbf2803; version=27af67f35631ac4b61b5e4455b44c9aee8d2cc4b <eeeddf85fc58d48c58ad916e4ca12363ebd8ab21; version=6.6

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS: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

T1499Endpoint Denial of Service

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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