Is CVE-2017-9049 in the CISA KEV catalog?

No. CVE-2017-9049 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-9049?

CVE-2017-9049 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2017-9049?

CVE-2017-9049 has an EPSS score of 4.63% (91th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-9049?

Upgrade libxml2 on debian 11 to 2.9.4+dfsg1-3.1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2017-9049

HIGHEPSS 91th pctl

7.5

CVSS v3

NVD

Description

libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a heap-based buffer over-read in the xmlDictComputeFastKey function in dict.c. This vulnerability causes programs that use libxml2, such as PHP, to crash. This vulnerability exists because of an incomplete fix for libxml2 Bug 759398.

CWE-125Out-of-bounds Read

How to fix

Remediation Available

libxml2Debian

Fixed in:2.9.4+dfsg1-3.1CVE-2017-9049

libxml2Ubuntu

Fixed in:2.9.1+dfsg1-3ubuntu4.10USN-3424-1

Fixed in:2.9.3+dfsg1-1ubuntu0.3USN-3424-1

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

Exploit Intelligence

4.63%probability of exploitation in 30 days

91stpercentile

High risk: more likely to be exploited than 91% of all known CVEs.

References

Patch1

openwall.com

Third-Party Advisory1

securityfocus.com

Other references4

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.