CVE & CISA-KEV Catalog

CVE-2026-1757

MEDIUM
6.2
CVSS v3
NVD

Description

A flaw was identified in the interactive shell of the xmllint utility, part of the libxml2 project, where memory allocated for user input is not properly released under certain conditions. When a user submits input consisting only of whitespace, the program skips command execution but fails to free the allocated buffer. Repeating this action causes memory to continuously accumulate. Over time, this can exhaust system memory and terminate the xmllint process, creating a denial-of-service condition on the local system.

CWE-401Missing Release of Memory (Memory Leak)

How to fix

Remediation Available
libxml2Debian
Fixed in:2.9.10+dfsg-6.7+deb11u10CVE-2026-1757
Fixed in:2.15.2+dfsg-0.1CVE-2026-1757
libxml2Ubuntu
Fixed in:2.14.5+dfsg-0.2ubuntu0.2USN-8460-1
libxml2-16Ubuntu
Fixed in:2.14.5+dfsg-0.2ubuntu0.2USN-8460-1
libxml2-devUbuntu
Fixed in:2.14.5+dfsg-0.2ubuntu0.2USN-8460-1
libxml2-utilsUbuntu
Fixed in:2.14.5+dfsg-0.2ubuntu0.2USN-8460-1
python3-libxml2Ubuntu
Fixed in:2.14.5+dfsg-0.2ubuntu0.2USN-8460-1

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 VectorLocal
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

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

Exploit Intelligence

0.19%probability of exploitation in 30 days
9thpercentile

Low risk: more likely to be exploited than 9% of all known CVEs.

References

Related Vulnerabilities

Other CWE-401 (Missing Release of Memory (Memory Leak)) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2020-13934High7.564%-Fix
CVE-2016-6304High7.563%-Fix
CVE-2019-12265Medium5.355%-Fix
CVE-2001-0136Medium5.045%--
CVE-2016-4232High7.536%--
CVE-2001-0543Medium5.021%--
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Markdown

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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 2026-04-22.