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.
No analysis available yet.
Remediation
No remediation available yet.
Tracking
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Advisories
| Source | ID | Title |
|---|---|---|
Debian DLA |
DLA-711-1 | curl security update |
Debian DSA |
DSA-3705-1 | curl security update |
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 |
USN-3123-1 | curl vulnerabilities |
References
History
Wed, 15 Apr 2026 21:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-04-15T20:54:57.538Z
Reserved: 2016-10-12T00:00:00.000Z
Link: CVE-2016-8622
Updated: 2024-08-06T02:27:40.993Z
Status : Modified
Published: 2018-07-31T21:29:00.317
Modified: 2024-11-21T02:59:41.960
Link: CVE-2016-8622
OpenCVE Enrichment
No data.
Debian DLA
Debian DSA
EUVD
Ubuntu USN