CVE-2024-49864Network attack vector

Kernel panic via RxRPC thread initialization race

Published Oct 21, 2024 · Updated Aug 5, 2026

A race condition in Linux kernel RxRPC allows remote attackers to trigger a kernel panic with UDP traffic during endpoint setup. rxrpc_open_socket() publishes the socket before creating its I/O thread, so rxrpc_encap_rcv() can dereference a null task_struct while waking that absent thread. Any unauthenticated host that can reach an RxRPC UDP port can repeatedly crash the kernel without user interaction.

CVSS severity7.5
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A race condition in Linux kernel RxRPC allows remote attackers to trigger a kernel panic with UDP traffic during endpoint setup. rxrpc_open_socket() publishes the socket before creating its I/O thread, so rxrpc_encap_rcv() can dereference a null task_struct while waking that absent thread. Any unauthenticated host that can reach an RxRPC UDP port can repeatedly crash the kernel without user interaction.

The record

CVE
CVE-2024-49864
Published
Oct 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-362, T1498
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 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=6.2
  2. Affected versionversion=a275da62e8c111b897b9cb73eb91df2f4e475ca5 <56e415202b8a17de6496f4023e545fcb66f118ec
  3. Affected versionversion=a275da62e8c111b897b9cb73eb91df2f4e475ca5 <bc212465326e8587325f520a052346f0b57360e6
  4. Affected versionversion=a275da62e8c111b897b9cb73eb91df2f4e475ca5 <c64f5fc95e9612fdf75587c8e21e494e614c18e2
  5. Affected versionversion=a275da62e8c111b897b9cb73eb91df2f4e475ca5 <cdf4bbbdb956d7426f687f38757ebca2a2759a0f

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.2; version=a275da62e8c111b897b9cb73eb91df2f4e475ca5 <56e415202b8a17de6496f4023e545fcb66f118ec; version=a275da62e8c111b897b9cb73eb91df2f4e475ca5 <bc212465326e8587325f520a052346f0b57360e6; version=a275da62e8c111b897b9cb73eb91df2f4e475ca5 <c64f5fc95e9612fdf75587c8e21e494e614c18e2; version=a275da62e8c111b897b9cb73eb91df2f4e475ca5 <cdf4bbbdb956d7426f687f38757ebca2a2759a0f

Published CVSS scores

7.5Linux kernel CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.7UbuntuCVSS:3.1/AV:L/AC:H/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1498Network 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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