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Vulnerabilities

Vulnerability · CVE-2017-9049

libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a heap-based buffer over-read in the xmlDictComputeFastKey function in dict.c.

Published May 18, 2017 · catalog updated Oct 14, 2026 · libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable

Check if you run it

No confirmed exploitation is on record for CVE-2017-9049. EPSS is 4.63%. Act only if a listed version of libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
4.63%
Remediation
Advisory link
Affected products
cpe xmlsoft/libxml2

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe xmlsoft/libxml22.9.4

How to fix CVE-2017-9049

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2017-9049. EPSS is 4.63%. Act only if a listed version of libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable is installed.

Which versions are affected?

Compare what you have installed with 2.9.4. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-125: Out-of-bounds Read. EPSS 4.63%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 18, 2017 · NIST NVD

    Detected

    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.

  2. Oct 14, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2017-9049

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2017-9049

    30-day exploitation probability 4.6%

    first.org
  • NIST NVDVulnerability recordCVE-2017-9049

    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 7

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.