Cyber Resilience

CVE-2023-4155

Race Condition in Redhat Enterprise Linux 8.0 … 9.0

Race Condition
Published
13 September 2023
Modified
21 November 2024
Patch / advisory
View advisory
CVSS Score v3.1 5.3
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H
EPSS Score 0.0016 6th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2023-4155 is a medium-severity Time-of-check Time-of-use (TOCTOU) Race Condition (CWE-367) vulnerability in Redhat Enterprise Linux. Its CVSS base score is 5.3 (Medium).

Operationally, ranked at the 6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability Data

A flaw was found in KVM AMD Secure Encrypted Virtualization (SEV) in the Linux kernel. A KVM guest using SEV-ES or SEV-SNP with multiple vCPUs can trigger a double fetch race condition vulnerability and invoke the `VMGEXIT` handler recursively. If…

more

an attacker manages to call the handler multiple times, they can trigger a stack overflow and cause a denial of service or potentially guest-to-host escape in kernel configurations without stack guard pages (`CONFIG_VMAP_STACK`).

CWE(s)
CWE-367

Related Threats

CVEs Like This One

CVE-2023-1073Same product: Fedoraproject Fedora
CVE-2024-0607Same product: Fedoraproject Fedora
CVE-2023-2194Same product: Fedoraproject Fedora
CVE-2023-42754Same product: Fedoraproject Fedora
CVE-2023-39192Same product: Fedoraproject Fedora
CVE-2023-4133Same product: Fedoraproject Fedora
CVE-2023-39193Same product: Fedoraproject Fedora
CVE-2023-3161Same product: Fedoraproject Fedora
CVE-2023-6622Same product: Fedoraproject Fedora
CVE-2023-1206Same product: Fedoraproject Fedora

Affected Assets

linux
linux kernel
all versions
redhat
enterprise linux
8.0, 9.0
fedoraproject
fedora
37, 38

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)
  • V15.4.2
  • V17.2.6

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-367

Timestamps meeting UTC or offset standards help identify TOCTOU issues through precise chronological reconstruction of check/use operations.

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 include coding standards and reviews that prevent TOCTOU 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.8.17 Clock synchronization none match
none

Reliable, synchronized time across systems narrows the exploitable window in which a resource state can change between a security check and its use.

References