How severe is CVE-2018-20168?

CVE-2018-20168 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-20168 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20168?

CVE-2018-20168 affects Google Gvisor. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20168?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-20168 published?

CVE-2018-20168 was published on 2018-12-17 and last updated on 2026-06-17.

CVE-2018-20168

CVE-2018-20168 is a medium-severity vulnerability in Google Gvisor with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Google Gvisor
Published: 2018-12-17
Last modified: 2026-06-17

Description

Google gVisor before 2018-08-22 reuses a pagetable in a different level with the paging-structure cache intact, which allows attackers to cause a denial of service ("physical address not valid" panic) via a crafted application.

Frequently asked questions

What is CVE-2018-20168?: Google gVisor before 2018-08-22 reuses a pagetable in a different level with the paging-structure cache intact, which allows attackers to cause a denial of service ("physical address not valid" panic) via a crafted application.
How severe is CVE-2018-20168?: CVE-2018-20168 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-20168 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20168?: CVE-2018-20168 affects Google Gvisor. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20168?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-20168 published?: CVE-2018-20168 was published on 2018-12-17 and last updated on 2026-06-17.

References

https://bugs.chromium.org/p/project-zero/issues/detail?id=1674

Affected products (1)

cpe:2.3:a:google:gvisor:*:*:*:*:*:*:*:*

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