Time-of-check Time-of-use (TOCTOU) Affecting perf package, versions <0:5.14.0-362.8.1.el9_3


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.04% (11th percentile)

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  • Snyk IDSNYK-ORACLE9-PERF-6064427
  • published17 Nov 2023
  • disclosed13 Sept 2023

Introduced: 13 Sep 2023

CVE-2023-4155  (opens in a new tab)
CWE-367  (opens in a new tab)

How to fix?

Upgrade Oracle:9 perf to version 0:5.14.0-362.8.1.el9_3 or higher.
This issue was patched in ELSA-2023-6583.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by Oracle. See How to fix? for Oracle:9 relevant fixed versions and status.

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 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).

CVSS Scores

version 3.1