CVE-2023-52573

Local kernel crash via null connection dereference

Published Mar 2, 2024 · Updated May 11, 2026

NULL-pointer dereference in Linux kernel RDS 5.1 through 6.6-rc2 allows local users to crash the host during an RDMA connection event. rds_rdma_cm_event_handler_cmn() passes a missing connection pointer to rdma_set_service_type() without first confirming that the connection exists. Triggering requires local low-privileged access and an RDS RDMA connection event; the reported consequence is limited to service interruption.

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

NULL-pointer dereference in Linux kernel RDS 5.1 through 6.6-rc2 allows local users to crash the host during an RDMA connection event. rds_rdma_cm_event_handler_cmn() passes a missing connection pointer to rdma_set_service_type() without first confirming that the connection exists. Triggering requires local low-privileged access and an RDS RDMA connection event; the reported consequence is limited to service interruption.

The record

CVE
CVE-2023-52573
Published
Mar 2, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 2, 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=5.1
  2. Affected versionversion=fd261ce6a30e01ad67c416e2c67e263024b3a6f9 <069ac51c37a6f07a51f7134d8c34289075786a35
  3. Affected versionversion=fd261ce6a30e01ad67c416e2c67e263024b3a6f9 <51fa66024a5eabf270164f2dc82a48ffb35a12e9
  4. Affected versionversion=fd261ce6a30e01ad67c416e2c67e263024b3a6f9 <812da2a08dc5cc75fb71e29083ea20904510ac7a
  5. Affected versionversion=fd261ce6a30e01ad67c416e2c67e263024b3a6f9 <ea82139e6e3561100d38d14401d57c0ea93fc07e
  6. Affected versionversion=fd261ce6a30e01ad67c416e2c67e263024b3a6f9 <f1d95df0f31048f1c59092648997686e3f7d9478
  7. Affected versionversion=fd261ce6a30e01ad67c416e2c67e263024b3a6f9 <f515112e833791001aaa8ab886af3ca78503617f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.1; version=fd261ce6a30e01ad67c416e2c67e263024b3a6f9 <069ac51c37a6f07a51f7134d8c34289075786a35; version=fd261ce6a30e01ad67c416e2c67e263024b3a6f9 <51fa66024a5eabf270164f2dc82a48ffb35a12e9; version=fd261ce6a30e01ad67c416e2c67e263024b3a6f9 <812da2a08dc5cc75fb71e29083ea20904510ac7a; version=fd261ce6a30e01ad67c416e2c67e263024b3a6f9 <ea82139e6e3561100d38d14401d57c0ea93fc07e; version=fd261ce6a30e01ad67c416e2c67e263024b3a6f9 <f1d95df0f31048f1c59092648997686e3f7d9478; version=fd261ce6a30e01ad67c416e2c67e263024b3a6f9 <f515112e833791001aaa8ab886af3ca78503617f

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

CWE-476NULL Pointer Dereference
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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