CVE-2015-8869

OCaml before 4.03.0 does not properly handle sign extensions, which allows remote attackers to conduct buffer overflow attacks or obtain sensitive information as demonstrated by a long string to the String.copy function.

Published: 2016-06-13 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-8869 is rated High Risk (68.1/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 3.77%). High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2015-8869

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-02-12 2.78% 3.77% +1.00%
2 2025-03-30 4.24% 2.78% -1.47%
3 2025-03-29 — 4.24% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-8869

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.1 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.2 [email protected]
6.4 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 4.9 [email protected]

Weakness enumeration for CVE-2015-8869

OS Trackers for CVE-2015-8869

vendor priority summary link
debian not yet assigned CVE-2015-8869 not yet assigned priority: Debian including 1 source packages (ocaml), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2015-8869
gentoo normal CVE-2015-8869: 1 GLSA(s) (201702-15), 1 atom(s) (dev-lang/ocaml); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2015-8869
redhat medium — https://access.redhat.com/security/cve/CVE-2015-8869
suse low CVE-2015-8869 severity low: SUSE including 78 source package names (libguestfs-1.32.7-3.el7, libguestfs-bash-completion-1.32.7-3.el7, …), 111 product×package rows across 16 product lines (SUSE Liberty Linux 7, SUSE Linux Enterprise Module for Development Tools 15, … (16 product lines)): Fixed 111. https://www.suse.com/security/cve/CVE-2015-8869/
ubuntu medium CVE-2015-8869 medium priority: Ubuntu including 1 source packages (ocaml), 17 status rows across 17 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, precise, trusty, upstream, wily, xenial, yakkety, zesty): not-affected 9, ignored 5, released 3. https://ubuntu.com/security/CVE-2015-8869

Affected software / configurations for CVE-2015-8869

Vendor Product Version Raw CPE
fedoraproject fedora 24 cpe:2.3:o:fedoraproject:fedora:24:*:*:*:*:*:*:*
opensuse opensuse 13.2 cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
ocaml ocaml <= 4.02.3 cpe:2.3:a:ocaml:ocaml:*:*:*:*:*:*:*:*

References for CVE-2015-8869

URL Tags
http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184507.html
http://lists.opensuse.org/opensuse-updates/2016-05/msg00081.html
http://lists.opensuse.org/opensuse-updates/2016-09/msg00037.html
http://rhn.redhat.com/errata/RHSA-2016-2576.html
http://rhn.redhat.com/errata/RHSA-2017-0564.html
http://rhn.redhat.com/errata/RHSA-2017-0565.html
http://www.openwall.com/lists/oss-security/2016/04/29/1
http://www.openwall.com/lists/oss-security/2016/04/29/6
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
http://www.securityfocus.com/bid/89318
https://access.redhat.com/errata/RHSA-2016:1296
https://github.com/ocaml/ocaml/commit/659615c7b100a89eafe6253e7a5b9d84d0e8df74#diff-a97df53e3ebc59bb457191b496c90762
https://security.gentoo.org/glsa/201702-15
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