CVE-2024-34777

Kernel memory disclosure via unchecked NUMA node ID

Published Jun 21, 2024 · Updated May 11, 2026

An out-of-bounds read in the Linux DMA mapping benchmark allows local users to disclose kernel memory via a crafted ioctl request. map_benchmark_ioctl passes an unchecked node identifier to node_possible, which indexes the node mask outside its valid bounds. Reachability requires local access to the DMA benchmark ioctl; the invalid read can expose kernel memory or fault the kernel.

CVSS severity7.1
High
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

An out-of-bounds read in the Linux DMA mapping benchmark allows local users to disclose kernel memory via a crafted ioctl request. map_benchmark_ioctl passes an unchecked node identifier to node_possible, which indexes the node mask outside its valid bounds. Reachability requires local access to the DMA benchmark ioctl; the invalid read can expose kernel memory or fault the kernel.

The record

CVE
CVE-2024-34777
Published
Jun 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 21, 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=65789daa8087e125927230ccb7e1eab13999b0cf <1ff05e723f7ca30644b8ec3fb093f16312e408ad
  3. Affected versionversion=65789daa8087e125927230ccb7e1eab13999b0cf <34a816d8735f3924b74be8e5bf766ade1f3bd10b
  4. Affected versionversion=65789daa8087e125927230ccb7e1eab13999b0cf <35d31c8bd4722b107f5a2f5ddddce839de04b936
  5. Affected versionversion=65789daa8087e125927230ccb7e1eab13999b0cf <63e7e05a48a35308aeddd7ecccb68363a5988e87
  6. Affected versionversion=65789daa8087e125927230ccb7e1eab13999b0cf <c57874265a3c5206d7aece3793bb2fc9abcd7570

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.11; version=65789daa8087e125927230ccb7e1eab13999b0cf <1ff05e723f7ca30644b8ec3fb093f16312e408ad; version=65789daa8087e125927230ccb7e1eab13999b0cf <34a816d8735f3924b74be8e5bf766ade1f3bd10b; version=65789daa8087e125927230ccb7e1eab13999b0cf <35d31c8bd4722b107f5a2f5ddddce839de04b936; version=65789daa8087e125927230ccb7e1eab13999b0cf <63e7e05a48a35308aeddd7ecccb68363a5988e87; version=65789daa8087e125927230ccb7e1eab13999b0cf <c57874265a3c5206d7aece3793bb2fc9abcd7570

Published CVSS scores

7.1UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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

CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

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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