CVE-2023-1077

Kernel memory corruption via empty RT queue

Published Mar 27, 2023 · Updated Aug 2, 2024

Type confusion in the Linux kernel RT scheduler allows local users to corrupt kernel memory through an empty real-time run queue. pick_next_rt_entity() applies list_entry() to an empty scheduler queue, receives its list_head rather than NULL, and treats it as a sched_rt_entity. A local low-privileged process must reach the high-complexity scheduler state; successful corruption affects kernel-level confidentiality, integrity, and availability.

CVSS severity7.0
High
EPSS probability0.28%
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 RT scheduler allows local users to corrupt kernel memory through an empty real-time run queue. pick_next_rt_entity() applies list_entry() to an empty scheduler queue, receives its list_head rather than NULL, and treats it as a sched_rt_entity. A local low-privileged process must reach the high-complexity scheduler state; successful corruption affects kernel-level confidentiality, integrity, and availability.

The record

CVE
CVE-2023-1077
Published
Mar 27, 2023
Updated
Aug 2, 2024
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-843, T1068
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Mar 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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 privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linux Kernelversion=unknown

Published CVSS scores

7.0NIST NVDCVSS:3.1/AV:L/AC:H/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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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