Is CVE-2017-5923 in the CISA KEV catalog?

No. CVE-2017-5923 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-5923?

CVE-2017-5923 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2017-5923?

CVE-2017-5923 has an EPSS score of 1.65% (74th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-5923?

Upgrade yara on debian 11 to 3.5.0+dfsg-9 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2017-5923

HIGHEPSS 74th pctl

7.5

CVSS v3

NVD

Description

libyara/grammar.y in YARA 3.5.0 allows remote attackers to cause a denial of service (heap-based out-of-bounds read and application crash) via a crafted rule that is mishandled in the yara_yyparse function.

CWE-125Out-of-bounds Read

How to fix

Remediation Available

yaraDebian

Fixed in:3.5.0+dfsg-9CVE-2017-5923

libyara3Ubuntu

Fixed in:3.4.0+dfsg-2ubuntu0.1~esm1USN-8080-1

Fixed in:3.7.1-1ubuntu2+esm1USN-8080-1

Fixed in:3.9.0-1ubuntu0.1~esm1USN-8080-1

python-yaraUbuntu

Fixed in:3.4.0+dfsg-2ubuntu0.1~esm1USN-8080-1

python3-yaraUbuntu

Fixed in:3.4.0+dfsg-2ubuntu0.1~esm1USN-8080-1

yaraUbuntu

Fixed in:3.4.0+dfsg-2ubuntu0.1~esm1USN-8080-1

Fixed in:3.7.1-1ubuntu2+esm1USN-8080-1

Fixed in:3.9.0-1ubuntu0.1~esm1USN-8080-1

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 VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

1.65%probability of exploitation in 30 days

74thpercentile

Elevated risk: more likely to be exploited than 74% of all known CVEs.

References

Patch2

Other references1

securityfocus.com

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2023-21769	High	7.5	92%	-	Fix
CVE-2023-49285	High	8.6	89%	-	Fix
CVE-2020-8794	Critical	9.8	89%	-	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 2026-05-13.