Vulnerability · CVE-2019-19956
xmlParseBalancedChunkMemoryRecover in parser.c in libxml2 before 2.9.10 has a memory leak related to newDoc->oldNs.
Published Dec 24, 2019 · catalog updated Oct 14, 2026 · xmlParseBalancedChunkMemoryRecover in parser.c in
Check if you run it
No confirmed exploitation is on record for CVE-2019-19956. EPSS is 5.63%. Act only if a listed version of xmlParseBalancedChunkMemoryRecover in parser.c in is installed.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (xmlParseBalancedChunkMemoryRecover in parser.c in).
- 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
- 5.63%
- Remediation
- Advisory link
- Affected products
- cpe canonical/ubuntu linux · cpe debian/debian linux · cpe fedoraproject/fedora · cpe netapp/active iq unified manager · cpe oracle/real user experience insight · cpe siemens/sinema remote connect server
xmlParseBalancedChunkMemoryRecover in parser.c in libxml2 before 2.9.10 has a memory leak related to newDoc->oldNs.
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 canonical/ubuntu linux12.04
- cpe canonical/ubuntu linux14.04
- cpe debian/debian linux8.0
- cpe debian/debian linux9.0
- cpe fedoraproject/fedora30
- cpe fedoraproject/fedora32
- cpe netapp/active iq unified managerversion unspecified
- cpe oracle/real user experience insight13.3.1.0
- cpe siemens/sinema remote connect serverversion unspecified
- cpe xmlsoft/libxml2version unspecified
How to fix CVE-2019-19956
Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories
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-2019-19956. EPSS is 5.63%. Act only if a listed version of xmlParseBalancedChunkMemoryRecover in parser.c in is installed.
Which versions are affected?
Compare what you have installed with canonical/ubuntu linux 12.04; canonical/ubuntu linux 14.04; debian/debian linux 8.0; debian/debian linux 9.0. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-401: Missing Release of Memory after Effective Lifetime; CWE-772: Missing Release of Resource after Effective Lifetime. EPSS 5.63%. 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.
Dec 24, 2019 · NIST NVD
Detected
xmlParseBalancedChunkMemoryRecover in parser.c in libxml2 before 2.9.10 has a memory leak related to newDoc->oldNs.
Oct 14, 2026 · NIST NVD
Updated
xmlParseBalancedChunkMemoryRecover in parser.c in libxml2 before 2.9.10 has a memory leak related to newDoc->oldNs.
Sources
- CVE.orgVulnerability recordCVE-2019-19956
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2019-19956
30-day exploitation probability 5.6%
first.org - NIST NVDVulnerability recordCVE-2019-19956
xmlParseBalancedChunkMemoryRecover in parser.c in libxml2 before 2.9.10 has a memory leak related to newDoc->oldNs.
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.