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Status published
Medium
CVE-2018-16840
A heap use-after-free flaw was found in curl versions from...
Vulnerability Description
A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an 'easy' handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
More from The Curl Project
View All →CVE-2018-16842
Curl versions 7.14.1 through 7.61.1 are vulnerable to a heap-based...
Medium
4.4
CVE-2018-16839
Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer...
Medium
4.3
CVE-2016-8625
curl before version 7.51.0 uses outdated IDNA 2003 standard to...
Medium
5.3
CVE-2016-8624
curl before version 7.51.0 doesn't parse the authority component of...
Medium
5.3
CVE-2016-8623
A flaw was found in curl before version 7.51.0. The...
Low
3.3
Affected Vendor
The Curl Project
View all reports →Affected Software
curl
Vulnerable Versions:
from 7.59.0 to 7.61.1
Timeline
Official Publish:
October 31st, 2018
Last Modified:
April 16th, 2026
Added to House:
July 20th, 2026
CVSS Vectors
V3:
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N