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.
Metrics
Affected Vendors & Products
References
History
Wed, 15 Apr 2026 21:15:00 +0000
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ssvc
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Status: PUBLISHED
Assigner: redhat
Published: 2018-07-31T21:00:00.000Z
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