How severe is CVE-2018-25023?

CVE-2018-25023 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2018-25023 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-25023?

CVE-2018-25023 affects Servo Smallvec. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-25023?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-25023 published?

CVE-2018-25023 was published on 2021-12-27 and last updated on 2026-06-17.

CVE-2018-25023

CVE-2018-25023 is a high-severity vulnerability in Servo Smallvec with a CVSS 3.x base score of 7.5. 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-908.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-908
Affected product: Servo Smallvec
Published: 2021-12-27
Last modified: 2026-06-17

Description

An issue was discovered in the smallvec crate before 0.6.13 for Rust. It can create an uninitialized value of any type, including a reference type.

Frequently asked questions

What is CVE-2018-25023?: An issue was discovered in the smallvec crate before 0.6.13 for Rust. It can create an uninitialized value of any type, including a reference type.
How severe is CVE-2018-25023?: CVE-2018-25023 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2018-25023 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-25023?: CVE-2018-25023 affects Servo Smallvec. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-25023?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-25023 published?: CVE-2018-25023 was published on 2021-12-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:servo:smallvec:*:*:*:*:*:rust:*:*

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