CVE-2020-27545

MEDIUM

6.5

CVSS v3

Description

libdwarf before 20201017 has a one-byte out-of-bounds read because of an invalid pointer dereference via an invalid line table in a crafted object.

CWE-763

How to fix

Remediation Available

libdwarfAmazon

Fixed in:0:20130207-4.amzn2.0.3

libdwarf-debuginfoAmazon

Fixed in:0:20130207-4.amzn2.0.3

libdwarf-develAmazon

Fixed in:0:20130207-4.amzn2.0.3

libdwarf-staticAmazon

Fixed in:0:20130207-4.amzn2.0.3

libdwarf-toolsAmazon

Fixed in:0:20130207-4.amzn2.0.3

dwarfutilsDebian

Fixed in:20201201-1CVE-2020-27545

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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 VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.82%probability of exploitation in 30 days

55thpercentile

Moderate risk: more likely to be exploited than 55% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory2

Product2

Related Vulnerabilities

Other CWE-763 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2007-4367	High	9.3	8.2%	-	Fix
CVE-2015-2695	Medium	5.0	6.2%	-	Fix
CVE-2013-4695	High	7.8	5.3%	-	-
CVE-2020-36224	High	7.5	4.3%	-	Fix
CVE-2022-31625	High	8.1	3.8%	-	Fix
CVE-2021-42377	Critical	9.8	3.6%	-	Fix

Common questions

How do I fix CVE-2020-27545?

Published advisories record a fix for 6 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2020-27545 being actively exploited?

Not that we know of. CVE-2020-27545 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.82% is the estimated probability that it will be exploited in the next 30 days. That is higher than 55% of all scored CVEs.

How severe is CVE-2020-27545?

CVE-2020-27545 has a CVSS v3 base score of 6.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2020-27545 affect?

Published advisories record a fix for libdwarf (Amazon), libdwarf-debuginfo (Amazon), libdwarf-devel (Amazon), libdwarf-static (Amazon), and 2 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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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 2026-06-17.