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CVE-2017-9049

26
FAUCET Score

CVE-2017-9049 is a heap-based buffer over-read vulnerability in the xmlDictComputeFastKey function of libxml2 versions 2.9.4-16-g0741801 and earlier. This flaw, stemming from an incomplete prior fix, can cause applications utilizing libxml2, such as PHP, to crash. With a CVSS score of 7.5 (High), it is remotely exploitable with low attack complexity, leading to a denial of service. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
2.9.4CPE matchmatch criteria
cpe:2.3:a:xmlsoft:libxml2:2.9.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.63%
Probability of exploitation in next 30 days
EPSS Percentile
90.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0463 is in the 84th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

redhatpatch availablevia redhat_api
Product: Text-Only JBCS
View patch
redhatno patchvia redhat_api
Product: Red Hat JBoss Core ServicesFixed in: libxml2
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: libxml2
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libxml2
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libxml2
redhatend of lifevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 3Fixed in: libxml2

Vendor Advisories (1)

redhatCVE-2017-9049Moderate

libxml2: Heap-based buffer over-read in function xmlDictComputeFastKey

May 15, 2017

References

lists.apache.org / thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
lists.apache.org / thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
security.gentoo.org / glsa/201711-01
debian.org / security/2017/dsa-3952
openwall.com / lists/oss-security/2017/05/15/1
ExploitMailing ListPatchThird Party Advisory
securityfocus.com / bid/98601
Third Party AdvisoryVDB Entry