CVE-2024-27413

Kernel availability loss via undersized address allocation

Published May 17, 2024 · Updated May 23, 2026

Memory corruption in affected Linux kernel releases allows local users to interrupt service through the EFI capsule loader. The efi_capsule_open function allocates cap_info->phys with the size of a pointer instead of phys_addr_t, leaving four bytes for an eight-byte value on 32-bit builds. Exposure requires a 32-bit kernel with EFI capsule support and local low-privileged access; the published sources do not specify whether interruption causes a crash, hang, or reboot.

CVSS severity5.5
Medium
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

Memory corruption in affected Linux kernel releases allows local users to interrupt service through the EFI capsule loader. The efi_capsule_open function allocates cap_info->phys with the size of a pointer instead of phys_addr_t, leaving four bytes for an eight-byte value on 32-bit builds. Exposure requires a 32-bit kernel with EFI capsule support and local low-privileged access; the published sources do not specify whether interruption causes a crash, hang, or reboot.

The record

CVE
CVE-2024-27413
Published
May 17, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 17, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=4.14.13 <4.15
  2. Affected versionversion=4.15
  3. Affected versionversion=95a362c9a6892085f714eb6e31eea6a0e3aa93bf
  4. Affected versionversion=f24c4d478013d82bd1b943df566fff3561d52864 <00cf21ac526011a29fc708f8912da446fac19f7b
  5. Affected versionversion=f24c4d478013d82bd1b943df566fff3561d52864 <11aabd7487857b8e7d768fefb092f66dfde68492
  6. Affected versionversion=f24c4d478013d82bd1b943df566fff3561d52864 <4b73473c050a612fb4317831371073eda07c3050
  7. Affected versionversion=f24c4d478013d82bd1b943df566fff3561d52864 <537e3f49dbe88881a6f0752beaa596942d9efd64
  8. Affected versionversion=f24c4d478013d82bd1b943df566fff3561d52864 <62a5dcd9bd3097e9813de62fa6f22815e84a0172
  9. Affected versionversion=f24c4d478013d82bd1b943df566fff3561d52864 <950d4d74d311a18baed6878dbfba8180d7e5dddd
  10. Affected versionversion=f24c4d478013d82bd1b943df566fff3561d52864 <ddc547dd05a46720866c32022300f7376c40119f
  11. Affected versionversion=f24c4d478013d82bd1b943df566fff3561d52864 <fccfa646ef3628097d59f7d9c1a3e84d4b6bb45e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.14.13 <4.15; version=4.15; version=95a362c9a6892085f714eb6e31eea6a0e3aa93bf; version=f24c4d478013d82bd1b943df566fff3561d52864 <00cf21ac526011a29fc708f8912da446fac19f7b; version=f24c4d478013d82bd1b943df566fff3561d52864 <11aabd7487857b8e7d768fefb092f66dfde68492; version=f24c4d478013d82bd1b943df566fff3561d52864 <4b73473c050a612fb4317831371073eda07c3050; version=f24c4d478013d82bd1b943df566fff3561d52864 <537e3f49dbe88881a6f0752beaa596942d9efd64; version=f24c4d478013d82bd1b943df566fff3561d52864 <62a5dcd9bd3097e9813de62fa6f22815e84a0172; version=f24c4d478013d82bd1b943df566fff3561d52864 <950d4d74d311a18baed6878dbfba8180d7e5dddd; version=f24c4d478013d82bd1b943df566fff3561d52864 <ddc547dd05a46720866c32022300f7376c40119f; version=f24c4d478013d82bd1b943df566fff3561d52864 <fccfa646ef3628097d59f7d9c1a3e84d4b6bb45e

Published CVSS scores

5.5UbuntuCVSS: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

T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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