CVE-2019-20934 Vulnerability Analysis & Exploit Details

CVE-2019-20934
Vulnerability Scoring

5.3
/10
Significant Risk

Security assessments indicate that CVE-2019-20934 presents a notable risk, potentially requiring prompt mitigation.

Attack Complexity Details

  • Attack Complexity: High
    Exploits require significant effort and special conditions.
  • Attack Vector: Local
    Vulnerability requires local system access.
  • Privileges Required: Low
    Some privileges are necessary to exploit the vulnerability.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2019-20934 Details

Status: Analyzed

Last updated: 🕜 12 Jan 2021, 13:49 UTC
Originally published on: 🕖 28 Nov 2020, 07:15 UTC

Time between publication and last update: 45 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H

CVE-2019-20934 Vulnerability Summary

CVE-2019-20934: An issue was discovered in the Linux kernel before 5.2.6. On NUMA systems, the Linux fair scheduler has a use-after-free in show_numa_stats() because NUMA fault statistics are inappropriately freed, aka CID-16d51a590a8c.

Assessing the Risk of CVE-2019-20934

Access Complexity Graph

The exploitability of CVE-2019-20934 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2019-20934

This vulnerability, CVE-2019-20934, requires a high level of attack complexity and low privileges, making it difficult but not impossible to exploit. Organizations should ensure robust security configurations to mitigate risks.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2019-20934, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2019-20934, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: Low
    CVE-2019-20934 could lead to minor leaks of non-critical information without major privacy breaches.
  • Integrity: None
    CVE-2019-20934 poses no threat to data integrity.
  • Availability: High
    CVE-2019-20934 can disrupt system operations, potentially causing complete denial of service (DoS).

Exploit Prediction Scoring System (EPSS)

The EPSS score estimates the probability that this vulnerability will be exploited in the near future.

EPSS Score: 0.044% (probability of exploit)

EPSS Percentile: 15.33% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 84.67% of others.

CVE-2019-20934 References

External References

CWE Common Weakness Enumeration

CWE-416

Vulnerable Configurations

  • cpe:2.3:o:linux:linux_kernel:4.19:-:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19:-:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.1:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.1:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.118-2:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.118-2:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.2:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.2:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.3:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.3:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.4:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.4:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.5:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.5:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.6:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.6:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.7:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.7:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.8:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.8:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.9:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.9:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.10:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.10:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.11:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.11:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.12:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.12:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.13:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.13:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.14:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.14:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.15:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.15:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.16:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.16:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.17:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.17:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.18:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.18:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.19:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.19:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.20:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.20:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.21:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.21:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.22:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.22:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.23:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.23:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.24:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.24:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.25:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.25:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.26:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.26:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.26.1:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.26.1:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.27:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.27:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.28:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.28:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.29:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.29:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.30:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.30:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.31:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.31:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.32:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.32:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.33:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.33:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.34:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.34:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.35:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.35:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.36:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.36:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.37:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.37:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.38:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.38:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.39:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.39:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.40:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.40:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.41:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.41:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.42:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.42:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.43:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.43:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.44:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.44:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.45:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.45:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.46:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.46:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.47:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.47:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.48:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.48:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.49:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.49:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.50:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.50:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.51:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.51:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.52:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.52:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.53:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.53:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.54:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.54:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.55:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.55:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.56:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.56:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.57:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.57:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.58:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.58:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.59:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.59:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.60:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.60:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.61:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.61:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.62:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.62:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:4.19.63:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:4.19.63:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.2:-:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.2:-:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.2.1:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.2.1:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.2.2:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.2.2:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.2.3:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.2.3:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.2.4:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.2.4:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.2.5:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.2.5:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.2.6:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.2.6:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.2.7:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.2.7:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.2.8:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.2.8:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.2.9:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.2.9:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.2.10:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.2.10:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.2.11:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.2.11:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.2.12:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.2.12:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.2.13:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.2.13:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.2.14:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.2.14:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.2.15:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.2.15:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.2.16:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.2.16:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.2.17:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.2.17:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.3:rc1:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.3:rc1:*:*:*:*:*:*

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