CVE-2023-1078

Local privilege escalation via RDS list type confusion

Published Mar 27, 2023 · Updated May 5, 2025

Type confusion in the Linux Kernel RDS protocol allows local users to corrupt memory and crash the system through zero-copy messages. rds_rm_zerocopy_callback() applies list_entry() to a list head, miscasts the queue as rds_msg_zcopy_info, and enables a controlled out-of-bounds cookie write; a second reversed list_add_tail() call loses entries and leaks memory. A low-privileged local account with access to RDS sockets can corrupt the queue lock for privilege escalation or repeat the leak until memory exhaustion interrupts the system.

CVSS severity7.8
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Type confusion in the Linux Kernel RDS protocol allows local users to corrupt memory and crash the system through zero-copy messages. rds_rm_zerocopy_callback() applies list_entry() to a list head, miscasts the queue as rds_msg_zcopy_info, and enables a controlled out-of-bounds cookie write; a second reversed list_add_tail() call loses entries and leaks memory. A low-privileged local account with access to RDS sockets can corrupt the queue lock for privilege escalation or repeat the leak until memory exhaustion interrupts the system.

The record

CVE
CVE-2023-1078
Published
Mar 27, 2023
Updated
May 5, 2025
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-787, CWE-843, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 27, 2023CVE publishedPublication date reported by the CVE source.
  2. May 5, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=unknown

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=unknown

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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-787Out-of-bounds Write
CWE-843Access of Resource Using Incompatible Type ('Type Confusion')
T1068Exploitation for Privilege Escalation

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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