CVE-2024-47668

Kernel memory corruption via stale radix pointer

Published Oct 9, 2024 · Updated Aug 5, 2026

Race condition in Linux before 6.11 allows local users to corrupt kernel memory through concurrent bcachefs operations. Concurrent depth growth in __genradix_ptr_alloc leaves a preallocated node pointing to the old root after a failed cmpxchg, then reuses it without zeroing. Write access to a mounted bcachefs volume is required; the stale pointer enables kernel-memory disclosure or corruption and can panic the kernel.

CVSS severity7.8
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Linux before 6.11 allows local users to corrupt kernel memory through concurrent bcachefs operations. Concurrent depth growth in __genradix_ptr_alloc leaves a preallocated node pointing to the old root after a failed cmpxchg, then reuses it without zeroing. Write access to a mounted bcachefs volume is required; the stale pointer enables kernel-memory disclosure or corruption and can panic the kernel.

The record

CVE
CVE-2024-47668
Published
Oct 9, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-362, T1499, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=5.1
  2. Affected versionversion=ba20ba2e3743bac786dff777954c11930256075e <0f078f8ca93b28a34e20bd050f12cd4efeee7c0f
  3. Affected versionversion=ba20ba2e3743bac786dff777954c11930256075e <0f27f4f445390cb7f73d4209cb2bf32834dc53da
  4. Affected versionversion=ba20ba2e3743bac786dff777954c11930256075e <99418ec776a39609f50934720419e0b464ca2283
  5. Affected versionversion=ba20ba2e3743bac786dff777954c11930256075e <ad5ee9feebc2eb8cfc76ed74a2d6e55343b0e169
  6. Affected versionversion=ba20ba2e3743bac786dff777954c11930256075e <b2f11c6f3e1fc60742673b8675c95b78447f3dae
  7. Affected versionversion=ba20ba2e3743bac786dff777954c11930256075e <d942e855324a60107025c116245095632476613e
  8. Affected versionversion=ba20ba2e3743bac786dff777954c11930256075e <ebeff038744c498a036e7a92eb8e433ae0a386d7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.1; version=ba20ba2e3743bac786dff777954c11930256075e <0f078f8ca93b28a34e20bd050f12cd4efeee7c0f; version=ba20ba2e3743bac786dff777954c11930256075e <0f27f4f445390cb7f73d4209cb2bf32834dc53da; version=ba20ba2e3743bac786dff777954c11930256075e <99418ec776a39609f50934720419e0b464ca2283; version=ba20ba2e3743bac786dff777954c11930256075e <ad5ee9feebc2eb8cfc76ed74a2d6e55343b0e169; version=ba20ba2e3743bac786dff777954c11930256075e <b2f11c6f3e1fc60742673b8675c95b78447f3dae; version=ba20ba2e3743bac786dff777954c11930256075e <d942e855324a60107025c116245095632476613e; version=ba20ba2e3743bac786dff777954c11930256075e <ebeff038744c498a036e7a92eb8e433ae0a386d7

Published CVSS scores

4.7NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8Linux CNACVSS: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

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1499Endpoint Denial of Service
T1068Exploitation for Privilege Escalation

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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