CVE-2020-36323

CVE Enrichment

CVSS: 8.2 HIGH
EPSS: 2.03%
EPSS Percentile: 81.14%
CISA KEV: Not listed

Description

In the standard library in Rust before 1.52.0, there is an optimization for joining strings that can cause uninitialized bytes to be exposed (or the program to crash) if the borrowed string changes after its length is checked.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: [email protected]
Published: 14-Apr-2021 14:15
Last Modified: 17-Jun-2026 10:15
EPSS Date: 2026-11-09
CWE: CWE-134

CVSS Vector


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

CNA Products / Version Status

n/a · n/a Source: CNA · [email protected]
Default status: unknown

n/a — affected

Affected Products / Versions

rust-lang / rust Source: NVD CPE · affected
Version / affected range: * · before (exclusive) 1.52.0
cpe:2.3:a:rust-lang:rust:*:*:*:*:*:*:*:*
fedoraproject / fedora Source: NVD CPE · affected
Version / affected range: 32
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
fedoraproject / fedora Source: NVD CPE · affected
Version / affected range: 33
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
fedoraproject / fedora Source: NVD CPE · affected
Version / affected range: 34
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

References

Last enrichment sync: 10-Nov-2026 09:31
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

In 2020, we reported that it trusted Borrow::borrow to return the same string on each call (CVE-2020-36323), and the fix handled strings that shrink between calls. Microsoft FORGE Details Rust Standard Library Bugs Found With AI-Assisted Research

CVE (1)

Vendors (1)

Products (2)

Tools (3)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.