CVE-2015-1819: The xmlreader in libxml allows remote attackers to cause a denial of service (memory consumption) via crafted

Q: How do I fix CVE-2015-1819?

debian linux: mitigate or apply the listed mitigation; ubuntu linux: mitigate or apply the listed mitigation; enterprise linux: upgrade to newer than 5.0. Exact commands for each OS are on this page.

Q: Is CVE-2015-1819 being exploited?

CVE-2015-1819 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2015-1819 affect?

CVE-2015-1819 affects debian linux, ubuntu linux, enterprise linux. Severity is medium (CVSS 5.0). The xmlreader in libxml allows remote attackers to cause a denial of service (memory consumption) via crafted XML data, related to an XML Entity Expansion (XEE) attack.

Q: How urgent is CVE-2015-1819?

Priority 46/100. EPSS top 6%: very likely to be exploited; On your watchlist

This month

MEDIUM 5.0WATCHLISTMITIGATEMITIGATEUPGRADE

CVE-2015-1819 is a medium-severity flaw (CVSS 5.0) affecting debian linux, ubuntu linux, enterprise linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The xmlreader in libxml allows remote attackers to cause a denial of service (memory consumption) via crafted XML data, related to an XML Entity Expansion (XEE) attack.

Why this priority

EPSS top 6%: very likely to be exploited
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	6.3% (top 6%)
CISA exploited list	No
Weakness	CWE-399
Published	2015-08-14
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: apple · canonical · debian · oracle · redhat · xmlsoft

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2015-08-14 18:59 UTCPublished CVE record published
2026-06-17 00:23 UTCUpdated Record last modified

debian debian linux MITIGATE

Affected: 7.0 · 8.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

canonical ubuntu linux MITIGATE

Affected: 12.04 · 14.04 · 15.04

Fixed in: no fixed release known

Safe to downgrade to: a release before 12.04

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

redhat enterprise linux UPGRADE

Affected: <= 5.0

Fixed in: newer than 5.0

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

xmlsoft libxml MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy libxml || rpm -q libxml || libxml --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

oracle solaris MITIGATE

Affected: 11.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.3

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

apple iphone os UPGRADE

Affected: <= 9.2.1

Fixed in: newer than 9.2.1

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2015-1819?

debian linux: mitigate or apply the listed mitigation; ubuntu linux: mitigate or apply the listed mitigation; enterprise linux: upgrade to newer than 5.0. Exact commands for each OS are on this page.

Is CVE-2015-1819 being exploited?

CVE-2015-1819 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2015-1819 affect?

CVE-2015-1819 affects debian linux, ubuntu linux, enterprise linux. Severity is medium (CVSS 5.0). The xmlreader in libxml allows remote attackers to cause a denial of service (memory consumption) via crafted XML data, related to an XML Entity Expansion (XEE) attack.

How urgent is CVE-2015-1819?

Priority 46/100. EPSS top 6%: very likely to be exploited; On your watchlist

Software pages

Ubuntu vulnerabilities · Debian vulnerabilities

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References

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