CVE-2024-35947

Kernel panic via zero-length dynamic-debug parser token

Published May 19, 2024 · Updated May 11, 2026

Kernel panic in Linux before 6.9 allows local users to crash the system via a malformed dynamic-debug control query. Within lib/dynamic_debug.c, ddebug_tokenize() invokes BUG_ON when malformed parser input produces a zero-length token instead of returning an error. Triggering the flaw requires local write access to the dynamic-debug control file, which upstream documentation restricts to root, and the resulting panic interrupts the host.

CVSS severity5.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Kernel panic in Linux before 6.9 allows local users to crash the system via a malformed dynamic-debug control query. Within lib/dynamic_debug.c, ddebug_tokenize() invokes BUG_ON when malformed parser input produces a zero-length token instead of returning an error. Triggering the flaw requires local write access to the dynamic-debug control file, which upstream documentation restricts to root, and the resulting panic interrupts the host.

The record

CVE
CVE-2024-35947
Published
May 19, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. May 19, 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=2.6.30
  2. Affected versionversion=9898abb3d23311fa227a7f46bf4e40fd2954057f <00e7d3bea2ce7dac7bee1cf501fb071fd0ea8f6c
  3. Affected versionversion=9898abb3d23311fa227a7f46bf4e40fd2954057f <343081c21e56bd6690d342e2f5ae8c00183bf081
  4. Affected versionversion=9898abb3d23311fa227a7f46bf4e40fd2954057f <3c718bddddca9cbef177ac475b94c5c91147fb38
  5. Affected versionversion=9898abb3d23311fa227a7f46bf4e40fd2954057f <41d8ac238ab1cab01a8c71798d61903304f4e79b
  6. Affected versionversion=9898abb3d23311fa227a7f46bf4e40fd2954057f <529e1852785599160415e964ca322ee7add7aef0
  7. Affected versionversion=9898abb3d23311fa227a7f46bf4e40fd2954057f <a66c869b17c4c4dcf81d273b02cb0efe88e127ab
  8. Affected versionversion=9898abb3d23311fa227a7f46bf4e40fd2954057f <a69e1bdd777ce51061111dc419801e8a2fd241cc
  9. Affected versionversion=9898abb3d23311fa227a7f46bf4e40fd2954057f <ba3c118cff7bcb0fe6aa84ae1f9080d50e31c561

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.30; version=9898abb3d23311fa227a7f46bf4e40fd2954057f <00e7d3bea2ce7dac7bee1cf501fb071fd0ea8f6c; version=9898abb3d23311fa227a7f46bf4e40fd2954057f <343081c21e56bd6690d342e2f5ae8c00183bf081; version=9898abb3d23311fa227a7f46bf4e40fd2954057f <3c718bddddca9cbef177ac475b94c5c91147fb38; version=9898abb3d23311fa227a7f46bf4e40fd2954057f <41d8ac238ab1cab01a8c71798d61903304f4e79b; version=9898abb3d23311fa227a7f46bf4e40fd2954057f <529e1852785599160415e964ca322ee7add7aef0; version=9898abb3d23311fa227a7f46bf4e40fd2954057f <a66c869b17c4c4dcf81d273b02cb0efe88e127ab; version=9898abb3d23311fa227a7f46bf4e40fd2954057f <a69e1bdd777ce51061111dc419801e8a2fd241cc; version=9898abb3d23311fa227a7f46bf4e40fd2954057f <ba3c118cff7bcb0fe6aa84ae1f9080d50e31c561

Published CVSS scores

5.5CISA-ADPCVSS: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

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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
PrivilegesUnavailable
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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