CVE-2024-33619

Local boot compromise via uninitialized runtime-map free

Published Jun 21, 2024 · Updated Aug 5, 2026

Use of an uninitialized resource in the Linux kernel EFI stub allows local users to corrupt memory during EFI boot. When efi_novamap is set, allocate_new_fdt_and_exit_boot() leaves priv.runtime_map uninitialized, but its failure path passes that value to free_pool(). Reachability requires local influence over the kernel command line or EFI System Partition and a failing device-tree allocation path; the resulting corruption compromises the boot environment.

CVSS severity7.8
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of an uninitialized resource in the Linux kernel EFI stub allows local users to corrupt memory during EFI boot. When efi_novamap is set, allocate_new_fdt_and_exit_boot() leaves priv.runtime_map uninitialized, but its failure path passes that value to free_pool(). Reachability requires local influence over the kernel command line or EFI System Partition and a failing device-tree allocation path; the resulting corruption compromises the boot environment.

The record

CVE
CVE-2024-33619
Published
Jun 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 21, 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=6.1
  2. Affected versionversion=f80d26043af91ceb5036c478101c015edb9e7630 <4b2543f7e1e6b91cfc8dd1696e3cdf01c3ac8974
  3. Affected versionversion=f80d26043af91ceb5036c478101c015edb9e7630 <6ca67a5fe1c606d1fbe24c30a9fc0bdc43a18554
  4. Affected versionversion=f80d26043af91ceb5036c478101c015edb9e7630 <9dce01f386c9ce6990c0a83fa14b1c95330b037e
  5. Affected versionversion=f80d26043af91ceb5036c478101c015edb9e7630 <b8938d6f570f010a1dcdbfed3e5b5d3258c2a908

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.1; version=f80d26043af91ceb5036c478101c015edb9e7630 <4b2543f7e1e6b91cfc8dd1696e3cdf01c3ac8974; version=f80d26043af91ceb5036c478101c015edb9e7630 <6ca67a5fe1c606d1fbe24c30a9fc0bdc43a18554; version=f80d26043af91ceb5036c478101c015edb9e7630 <9dce01f386c9ce6990c0a83fa14b1c95330b037e; version=f80d26043af91ceb5036c478101c015edb9e7630 <b8938d6f570f010a1dcdbfed3e5b5d3258c2a908

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5NIST NVDCVSS: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

CWE-908Use of Uninitialized Resource
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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