CVE-2015-8011 [Critical] | Denial of Service in Lldpd

Buffer overflow in the lldp_decode function in daemon/protocols/lldp.c in lldpd before 0.8.0 allows remote attackers to cause a denial of service (daemon crash) and possibly execute arbitrary code via vectors involving large management addresses and TLV boundaries.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-14	5.56%	4.74%	-0.81%
2	2026-05-30	4.22%	5.56%	+1.33%
3	2026-04-16	—	4.22%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-14

5.56%

4.74%

-0.81%

2026-05-30

4.22%

5.56%

+1.33%

2026-04-16

—

4.22%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
9.8	3.1	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	5.9	[email protected]
6.8	2.0	MEDIUM	`AV:N/AC:M/Au:N/C:P/I:P/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:M) Exploitation needs some favorable conditions, but not exceptional ones. Authentication (AU:N) No authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:P) Partial availability impact.	8.6	6.4	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

9.8

3.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

5.9

[email protected]

6.8

2.0

MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:M): Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:P): Partial confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:P): Partial availability impact.

8.6

6.4

[email protected]

OS Trackers for CVE-2015-8011

vendor	priority	summary	link
`alpine`	critical	CVE-2015-8011: 1 source package rows (openvswitch); 7 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 7, open 0.	https://security.alpinelinux.org/vuln/CVE-2015-8011
`debian`	not yet assigned	CVE-2015-8011 not yet assigned priority: Debian including 2 source packages (lldpd, openvswitch), 10 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 10.	https://security-tracker.debian.org/tracker/CVE-2015-8011
`redhat`	high	—	https://access.redhat.com/security/cve/CVE-2015-8011
`ubuntu`	medium	CVE-2015-8011 medium priority: Ubuntu including 2 source packages (lldpd, openvswitch), 20 status rows across 14 suites (artful, bionic, cosmic, disco, focal, groovy, precise, trusty, upstream, vivid, wily, xenial, yakkety, zesty): not-affected 9, released 5, ignored 3, DNE 2, needs-triage 1.	https://ubuntu.com/security/CVE-2015-8011

Affected software / configurations for CVE-2015-8011

Vendor	Product	Version	Raw CPE
lldpd_project	lldpd	>= 0.5.6, < 0.8.0	cpe:2.3:a:lldpd_project:lldpd::::::::
debian	debian_linux	9.0	cpe:2.3:o:debian:debian_linux:9.0:::::::*
debian	debian_linux	10.0	cpe:2.3:o:debian:debian_linux:10.0:::::::*
fedoraproject	fedora	33	cpe:2.3:o:fedoraproject:fedora:33:::::::*

References for CVE-2015-8011

URL	Tags
http://www.openwall.com/lists/oss-security/2015/10/16/2	Mailing List Patch Third Party Advisory
http://www.openwall.com/lists/oss-security/2015/10/30/2	Mailing List Patch Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-941426.pdf
https://github.com/vincentbernat/lldpd/commit/dd4f16e7e816f2165fba76e3d162cd8d2978dcb2	Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00032.html	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UJ4DXFJWMZ325ECZXPZOSK7BOEDJZHPR/
https://us-cert.cisa.gov/ics/advisories/icsa-21-194-07
https://www.debian.org/security/2021/dsa-4836	Third Party Advisory

URL

CVE-2015-8011

Exploit prediction scoring system (EPSS) score for CVE-2015-8011

Common vulnerability scoring system (CVSS) metrics for CVE-2015-8011

Weakness enumeration for CVE-2015-8011

OS Trackers for CVE-2015-8011

Affected software / configurations for CVE-2015-8011

References for CVE-2015-8011