What is the CVSS score of CVE-2021-25900?

CVE-2021-25900 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 1.7%.

Is there a public PoC exploit available for CVE-2021-25900?

Yes, a public proof-of-concept exploit is available for CVE-2021-25900. Prioritise patching immediately. EPSS: 1.7%.

Is there a patch available for CVE-2021-25900?

Yes, a patch is available for CVE-2021-25900. Update the affected software to the latest version immediately.

Smallvec CVE-2021-25900

CRITICAL

Out-of-bounds Write (CWE-787)

2021-01-26 cve@mitre.org

Buffer Overflow Memory Corruption Smallvec

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Jan 26, 2021 - 18:16 nvd

CRITICAL 9.8

DescriptionNVD

An issue was discovered in the smallvec crate before 0.6.14 and 1.x before 1.6.1 for Rust. There is a heap-based buffer overflow in SmallVec::insert_many.

AnalysisAI

An issue was discovered in the smallvec crate before 0.6.14 and 1.x before 1.6.1 for Rust. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. An issue was discovered in the smallvec crate before 0.6.14 and 1.x before 1.6.1 for Rust. There is a heap-based buffer overflow in SmallVec::insert_many. Affected products include: Servo Smallvec. Version information: before 0.6.14.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).