Cyber Resilience

CVE-2023-4732

Race Condition in Linux Kernel ≤ 5.13.19

Race Condition
Published
03 October 2023
Modified
21 November 2024
CVSS Score v3.1 4.7
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0018 8th percentile
Risk Priority 36 floored blend · peak EPSS

Summary

CVE-2023-4732 is a medium-severity Race Condition within a Thread (CWE-366) vulnerability in Linux Linux Kernel. Its CVSS base score is 4.7 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A06:2025 Insecure Design

EU & UK References

Vulnerability Data

A flaw was found in pfn_swap_entry_to_page in memory management subsystem in the Linux Kernel. In this flaw, an attacker with a local user privilege may cause a denial of service problem due to a BUG statement referencing pmd_t x.

CWE(s)
CWE-366CWE-362

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1548 Abuse Elevation Control Mechanism Privilege Escalation
Adversaries may circumvent mechanisms designed to control privilege elevation to gain higher-level permissions.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-6546Same product: Linux Linux Kernel
CVE-2023-33951Same product: Linux Linux Kernel
CVE-2023-33203Same product: Linux Linux Kernel
CVE-2023-6531Same product: Linux Linux Kernel
CVE-2023-5633Same product: Linux Linux Kernel
CVE-2023-33952Same product: Linux Linux Kernel
CVE-2026-46181Same product: Linux Linux Kernel
CVE-2024-0641Same product: Linux Linux Kernel
CVE-2024-0639Same product: Linux Linux Kernel
CVE-2026-43198Same product: Linux Linux Kernel

Affected Assets

linux
linux kernel
≤ 5.13.19
redhat
codeready linux builder
8.0
redhat
codeready linux builder for arm64
8.0_aarch64
redhat
codeready linux builder for power little endian
8.0_ppc64le
redhat
enterprise linux
8.0
redhat
enterprise linux for arm 64
8.0_aarch64
redhat
enterprise linux for ibm z systems
8.0_s390x
redhat
enterprise linux for power little endian
8.0_ppc64le
redhat
enterprise linux for real time
8.0
redhat
enterprise linux for real time for nfv
8.0

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V10.4.2
  • V10.4.5
  • V15.1.3
  • V15.4.1

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

AU-8 Time Stamps
addresses: CWE-362

Accurate timestamps from internal clocks enable detection of race conditions by providing reliable event ordering in audit logs.

PL-6 Security-related Activity Planning
addresses: CWE-362

Coordination of concurrent security activities reduces the probability that shared resources will be accessed simultaneously without proper synchronization.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require synchronization primitives and concurrency analysis that prevent intra-thread race conditions.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect race conditions through concurrency and stress testing.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle includes concurrency and synchronization practices that reduce race conditions.

A.8.26 Application security requirements partial match
prevents

Application security requirements can mandate thread-safety and locking controls.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles address concurrent access and resource synchronization.

A.8.28 Secure coding partial match
prevents

Secure coding standards directly require proper synchronization primitives to prevent race conditions.

A.8.32 Change management none match
none

Change management can introduce or remove synchronization flaws during updates.

References