Is CVE-2020-28928 in the CISA KEV catalog?

No. CVE-2020-28928 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-28928?

CVE-2020-28928 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2020-28928?

CVE-2020-28928 has an EPSS score of 0.64% (46th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-28928?

Upgrade musl on debian 11 to 1.2.2-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2020-28928

MEDIUM

5.5

CVSS v3

NVD

Description

In musl libc through 1.2.1, wcsnrtombs mishandles particular combinations of destination buffer size and source character limit, as demonstrated by an invalid write access (buffer overflow).

CWE-787Out-of-bounds Write

How to fix

Remediation Available

muslDebian

Fixed in:1.2.2-1CVE-2020-28928

muslUbuntu

Fixed in:0.9.15-1ubuntu0.1~esm2USN-5990-1

Fixed in:1.1.9-1ubuntu0.1~esm3USN-5990-1

Fixed in:1.1.19-1ubuntu0.1~esm1USN-5990-1

Fixed in:1.1.24-1ubuntu0.1~esm1USN-5990-1

musl-devUbuntu

Fixed in:0.9.15-1ubuntu0.1~esm2USN-5990-1

Fixed in:1.1.9-1ubuntu0.1~esm3USN-5990-1

Fixed in:1.1.19-1ubuntu0.1~esm1USN-5990-1

Fixed in:1.1.24-1ubuntu0.1~esm1USN-5990-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.64%probability of exploitation in 30 days

46thpercentile

Moderate risk: more likely to be exploited than 46% of all known CVEs.

References

Patch2

Vendor Advisory1

musl.libc.org

Third-Party Advisory2

Other references5

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.