Is CVE-2017-9304 in the CISA KEV catalog?

No. CVE-2017-9304 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-9304?

CVE-2017-9304 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2017-9304?

CVE-2017-9304 has an EPSS score of 1.84% (76th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-9304?

Upgrade yara on debian 11 to 3.6.1+dfsg-1 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2017-9304

HIGHEPSS 76th pctl

7.5

CVSS v3

NVD

Description

libyara/re.c in the regexp module in YARA 3.5.0 allows remote attackers to cause a denial of service (stack consumption) via a crafted rule that is mishandled in the _yr_re_emit function.

CWE-674

How to fix

Remediation Available

yaraDebian

Fixed in:3.6.1+dfsg-1CVE-2017-9304

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

1.84%probability of exploitation in 30 days

76thpercentile

Elevated risk: more likely to be exploited than 76% of all known CVEs.

References

Patch2

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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.