Description
The URL percent-encoding decode function in libcurl before 7.51.0 is called `curl_easy_unescape`. Internally, even if this function would be made to allocate a unscape destination buffer larger than 2GB, it would return that new length in a signed 32 bit integer variable, thus the length would get either just truncated or both truncated and turned negative. That could then lead to libcurl writing outside of its heap based buffer.
Published: 2018-07-31
Score: 3.7 Low
EPSS: 1.6% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-711-1 curl security update
Debian DSA Debian DSA DSA-3705-1 curl security update
EUVD EUVD EUVD-2016-9467 The URL percent-encoding decode function in libcurl before 7.51.0 is called `curl_easy_unescape`. Internally, even if this function would be made to allocate a unscape destination buffer larger than 2GB, it would return that new length in a signed 32 bit integer variable, thus the length would get either just truncated or both truncated and turned negative. That could then lead to libcurl writing outside of its heap based buffer.
Ubuntu USN Ubuntu USN USN-3123-1 curl vulnerabilities
History

Wed, 15 Apr 2026 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Subscriptions

Haxx Libcurl
Redhat Jboss Core Services Rhel Software Collections
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-04-15T20:54:57.538Z

Reserved: 2016-10-12T00:00:00.000Z

Link: CVE-2016-8622

cve-icon Vulnrichment

Updated: 2024-08-06T02:27:40.993Z

cve-icon NVD

Status : Modified

Published: 2018-07-31T21:29:00.317

Modified: 2024-11-21T02:59:41.960

Link: CVE-2016-8622

cve-icon Redhat

Severity : Low

Publid Date: 2016-11-02T00:00:00Z

Links: CVE-2016-8622 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses