CVE-2024-49571Network attack vector

Kernel disclosure and crash via unchecked SMC offsets

Published Jan 11, 2025 · Updated Aug 5, 2026

Out-of-bounds reads in the Linux kernel SMC server allow remote attackers to disclose kernel data or interrupt SMC service. smc_clc_msg_prop_valid() trusts client-controlled iparea_offset and ipv6_prefixes_cnt values when locating and validating prefix data, allowing reads beyond the proposal buffer and a NULL dereference. Reachability requires an SMC-enabled listening socket; an unauthenticated client completing the TCP handshake can disclose adjacent kernel heap data, deadlock future SMC handshakes, or panic the host.

CVSS severity9.1
Critical
EPSS probability0.59%
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 reads in the Linux kernel SMC server allow remote attackers to disclose kernel data or interrupt SMC service. smc_clc_msg_prop_valid() trusts client-controlled iparea_offset and ipv6_prefixes_cnt values when locating and validating prefix data, allowing reads beyond the proposal buffer and a NULL dereference. Reachability requires an SMC-enabled listening socket; an unauthenticated client completing the TCP handshake can disclose adjacent kernel heap data, deadlock future SMC handshakes, or panic the host.

The record

CVE
CVE-2024-49571
Published
Jan 11, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.16
  2. Affected versionversion=e7b7a64a8493d47433fd003efbe6543e3f676294 <47ce46349672a7e0c361bfe39ed0b22e824ef4fb
  3. Affected versionversion=e7b7a64a8493d47433fd003efbe6543e3f676294 <62056d1592e63d85e82357ee2ae6a6a294f440b0
  4. Affected versionversion=e7b7a64a8493d47433fd003efbe6543e3f676294 <846bada23bfcdeb83621b045ed85dc06c7833ff0
  5. Affected versionversion=e7b7a64a8493d47433fd003efbe6543e3f676294 <91a7c27c1444ed4677b83fd5308d2cf03f5f0851
  6. Affected versionversion=e7b7a64a8493d47433fd003efbe6543e3f676294 <a29e220d3c8edbf0e1beb0f028878a4a85966556
  7. Affected versionversion=e7b7a64a8493d47433fd003efbe6543e3f676294 <f10635268a0a49ee902a3b63b5dbb76f4fed498e

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.16; version=e7b7a64a8493d47433fd003efbe6543e3f676294 <47ce46349672a7e0c361bfe39ed0b22e824ef4fb; version=e7b7a64a8493d47433fd003efbe6543e3f676294 <62056d1592e63d85e82357ee2ae6a6a294f440b0; version=e7b7a64a8493d47433fd003efbe6543e3f676294 <846bada23bfcdeb83621b045ed85dc06c7833ff0; version=e7b7a64a8493d47433fd003efbe6543e3f676294 <91a7c27c1444ed4677b83fd5308d2cf03f5f0851; version=e7b7a64a8493d47433fd003efbe6543e3f676294 <a29e220d3c8edbf0e1beb0f028878a4a85966556; version=e7b7a64a8493d47433fd003efbe6543e3f676294 <f10635268a0a49ee902a3b63b5dbb76f4fed498e

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
9.1LinuxCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
6.3SUSECVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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