CVE-2018-16839

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

5.78% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 92.7% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2018-10-31 18:00Z8 YR AGO

Last updated

2026-04-15 20:57Z6 MO AGO

Reserved

2018-09-11

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Medium (CVSS 4.3)

CNA CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Weaknesses

• CWE-122Heap-based Buffer OverflowVariant
• CWE-190Integer Overflow or WraparoundBase
• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass

Data version

5.2

Document digest

f96fefd4a54c1e2c626ce7605fafaa7139a34462087ae9e68af8310ddba5c08b

• security.gentoo.orgGLSA-201903-03https://security.gentoo.org/glsa/201903-03vendor-advisoryx_refsource_GENTOO
• www.debian.orgDSA-4331https://www.debian.org/security/2018/dsa-4331vendor-advisoryx_refsource_DEBIAN
• lists.debian.org[debian-lts-announce] 20181106 [SECURITY] [DLA 1568-1] curl security updatehttps://lists.debian.org/debian-lts-announce/2018/11/msg00005.htmlmailing-listx_refsource_MLIST
• curl.haxx.sehttps://curl.haxx.se/docs/CVE-2018-16839.htmlx_refsource_MISC
• github.comhttps://github.com/curl/curl/commit/f3a24d7916b9173c69a3e0ee790102993833d6c5x_refsource_CONFIRM
• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16839x_refsource_CONFIRM
• www.securitytracker.com1042012http://www.securitytracker.com/id/1042012vdb-entryx_refsource_SECTRACK
• usn.ubuntu.comUSN-3805-1https://usn.ubuntu.com/3805-1/vendor-advisoryx_refsource_UBUNTU
• lists.apache.org[infra-devnull] 20190404 [GitHub] [incubator-openwhisk-runtime-ballerina] falkzoll commented on issue #15: Update to new base image jdk8u202-b08_openj9-0.12.1.https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3Emailing-listx_refsource_MLIST