CVE-2016-7797 [High] | Denial of Service in Pacemaker

CVE-2016-7797 is rated Moderate Risk (59.1/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.42%). Review affected assets and schedule remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-12-14	2.95%	2.42%	-0.54%
2	2025-03-30	9.30%	2.95%	-6.35%
3	2025-03-29	—	9.30%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-12-14

2.95%

2.42%

-0.54%

2025-03-30

9.30%

2.95%

-6.35%

2025-03-29

—

9.30%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.0	HIGH	`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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:N) Doesn’t really leak secrets in a meaningful 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	3.6	[email protected]
5.0	2.0	MEDIUM	`AV:N/AC:L/Au:N/C:N/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:N) No confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:P) Partial availability impact.	10.0	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.5

3.0

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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:N): Doesn’t really leak secrets in a meaningful 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

3.6

[email protected]

5.0

2.0

MEDIUM

AV:N/AC:L/Au:N/C:N/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:N): No confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:P): Partial availability impact.

10.0

2.9

[email protected]

OS Trackers for CVE-2016-7797

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2016-7797 not yet assigned priority: Debian including 1 source packages (pacemaker), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2016-7797
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2016-7797
`suse`	medium	—	https://www.suse.com/security/cve/CVE-2016-7797/
`ubuntu`	medium	CVE-2016-7797 medium priority: Ubuntu including 1 source packages (pacemaker), 7 status rows across 7 suites (artful, precise, trusty, upstream, xenial, yakkety, zesty): not-affected 3, released 2, DNE 1, ignored 1.	https://ubuntu.com/security/CVE-2016-7797

Affected software / configurations for CVE-2016-7797

Vendor	Product	Version	Raw CPE
clusterlabs	pacemaker	<= 1.1.14	cpe:2.3:a:clusterlabs:pacemaker::::::::
opensuse	leap	42.2	cpe:2.3:o:opensuse:leap:42.2:::::::*
opensuse_project	leap	42.1	cpe:2.3:o:opensuse_project:leap:42.1:::::::*
suse	linux_enterprise_high_availability	12	cpe:2.3:o:suse:linux_enterprise_high_availability:12:sp2::::::
suse	linux_enterprise_software_development_kit	12	cpe:2.3:o:suse:linux_enterprise_software_development_kit:12:sp2::::::
redhat	enterprise_linux_high_availability	7.0	cpe:2.3:o:redhat:enterprise_linux_high_availability:7.0:::::::*
redhat	enterprise_linux_resilient_storage	7.0	cpe:2.3:o:redhat:enterprise_linux_resilient_storage:7.0:::::::*

References for CVE-2016-7797

URL	Tags
http://bugs.clusterlabs.org/show_bug.cgi?id=5269	Issue Tracking Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-11/msg00038.html	Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00001.html	Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2016-12/msg00077.html	Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-2578.html	Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/10/01/1	Mailing List Patch Third Party Advisory
http://www.securityfocus.com/bid/93261	Third Party Advisory VDB Entry
https://github.com/ClusterLabs/pacemaker/commit/5ec24a2642bd0854b884d1a9b51d12371373b410	Patch Third Party Advisory

URL

CVE-2016-7797

Exploit prediction scoring system (EPSS) score for CVE-2016-7797

Common vulnerability scoring system (CVSS) metrics for CVE-2016-7797

Weakness enumeration for CVE-2016-7797

OS Trackers for CVE-2016-7797

Affected software / configurations for CVE-2016-7797

References for CVE-2016-7797