CVE-2024-42322

Local service interruption via direct RCU pointer dereference

Published Aug 17, 2024 · Updated May 11, 2026

Improper pointer access in Linux kernel IPVS allows local users to interrupt service when creating a persistence-enabled virtual service. In ip_vs_add_service, the code publishes pe through svc->pe with RCU_INIT_POINTER and then directly dereferences svc->pe to test conn_out instead of testing the local pointer before publication. Reaching this path requires local low-privileged access and a persistence engine with a conn_out callback; the bounded impact is availability loss.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper pointer access in Linux kernel IPVS allows local users to interrupt service when creating a persistence-enabled virtual service. In ip_vs_add_service, the code publishes pe through svc->pe with RCU_INIT_POINTER and then directly dereferences svc->pe to test conn_out instead of testing the local pointer before publication. Reaching this path requires local low-privileged access and a persistence engine with a conn_out callback; the bounded impact is availability loss.

The record

CVE
CVE-2024-42322
Published
Aug 17, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 17, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=39b9722315364121c6e2524515a6e95d52287549 <211168339657f36f32fb597afd0e3ac82d726119
  2. Affected versionversion=39b9722315364121c6e2524515a6e95d52287549 <36c997f1e03601475ad0fda0e0f59b7a209e756b
  3. Affected versionversion=39b9722315364121c6e2524515a6e95d52287549 <3dd428039e06e1967ce294e2cd6342825aaaad77
  4. Affected versionversion=39b9722315364121c6e2524515a6e95d52287549 <b2c664df3bb46aabac6a5fd78aaa5bd614cfad97
  5. Affected versionversion=39b9722315364121c6e2524515a6e95d52287549 <c420cd5d5bc6797f3a8824e7d74f38f0c286fca5
  6. Affected versionversion=39b9722315364121c6e2524515a6e95d52287549 <cbd070a4ae62f119058973f6d2c984e325bce6e7
  7. Affected versionversion=4.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=39b9722315364121c6e2524515a6e95d52287549 <211168339657f36f32fb597afd0e3ac82d726119; version=39b9722315364121c6e2524515a6e95d52287549 <36c997f1e03601475ad0fda0e0f59b7a209e756b; version=39b9722315364121c6e2524515a6e95d52287549 <3dd428039e06e1967ce294e2cd6342825aaaad77; version=39b9722315364121c6e2524515a6e95d52287549 <b2c664df3bb46aabac6a5fd78aaa5bd614cfad97; version=39b9722315364121c6e2524515a6e95d52287549 <c420cd5d5bc6797f3a8824e7d74f38f0c286fca5; version=39b9722315364121c6e2524515a6e95d52287549 <cbd070a4ae62f119058973f6d2c984e325bce6e7; version=4.7

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 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

T1499Endpoint Denial of Service

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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