CVE-2024-47408

Host crash via unchecked SMC extension offset

Published Jan 11, 2025 · Updated Aug 5, 2026

Out-of-bounds access in the Linux kernel SMC server allows attackers to crash the host with a crafted connection proposal message. The smc_get_clc_v2_ext function uses the client-controlled smcd_v2_ext_offset to calculate an extension pointer without rejecting values beyond the proposal area's maximum offset. Exploitation requires an SMC-enabled listening endpoint that processes the proposal; the resulting invalid address access interrupts the host by crashing its kernel.

CVSS severity5.5
Medium
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in the Linux kernel SMC server allows attackers to crash the host with a crafted connection proposal message. The smc_get_clc_v2_ext function uses the client-controlled smcd_v2_ext_offset to calculate an extension pointer without rejecting values beyond the proposal area's maximum offset. Exploitation requires an SMC-enabled listening endpoint that processes the proposal; the resulting invalid address access interrupts the host by crashing its kernel.

The record

CVE
CVE-2024-47408
Published
Jan 11, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 11, 2025CVE 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=5.10
  2. Affected versionversion=5c21c4ccafe85906db809de3af391fd434df8a27 <48d5a8a304a643613dab376a278f29d3e22f7c34
  3. Affected versionversion=5c21c4ccafe85906db809de3af391fd434df8a27 <935caf324b445fe73d7708fae6f7176fb243f357
  4. Affected versionversion=5c21c4ccafe85906db809de3af391fd434df8a27 <9ab332deb671d8f7e66d82a2ff2b3f715bc3a4ad
  5. Affected versionversion=5c21c4ccafe85906db809de3af391fd434df8a27 <a36364d8d4fabb105001f992fb8ff2d3546203d6
  6. Affected versionversion=5c21c4ccafe85906db809de3af391fd434df8a27 <e1cc8be2a785a8f1ce1f597f3e608602c5fccd46

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.10; version=5c21c4ccafe85906db809de3af391fd434df8a27 <48d5a8a304a643613dab376a278f29d3e22f7c34; version=5c21c4ccafe85906db809de3af391fd434df8a27 <935caf324b445fe73d7708fae6f7176fb243f357; version=5c21c4ccafe85906db809de3af391fd434df8a27 <9ab332deb671d8f7e66d82a2ff2b3f715bc3a4ad; version=5c21c4ccafe85906db809de3af391fd434df8a27 <a36364d8d4fabb105001f992fb8ff2d3546203d6; version=5c21c4ccafe85906db809de3af391fd434df8a27 <e1cc8be2a785a8f1ce1f597f3e608602c5fccd46

Published CVSS scores

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 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

T1499.004Application 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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