CVE-2023-1668 [High] | Security Vulnerability in Open Vswitch

A flaw was found in openvswitch (OVS). When processing an IP packet with protocol 0, OVS will install the datapath flow without the action modifying the IP header. This issue results (for both kernel and userspace datapath) in installing a datapath flow matching all IP protocols (nw_proto is wildcarded) for this flow, but with an incorrect action, possibly causing incorrect handling of other IP packets with a != 0 IP protocol that matches this dp flow.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-05-13	0.28%	0.24%	-0.04%
2	2026-04-28	0.24%	0.28%	+0.04%
3	2026-04-24	—	0.24%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-05-13

0.28%

0.24%

-0.04%

2026-04-28

0.24%

0.28%

+0.04%

2026-04-24

—

0.24%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.2	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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:L) Some sensitive info could get out, but not a total data dump. 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	4.2	[email protected]
8.2	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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:L) Some sensitive info could get out, but not a total data dump. 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	4.2	134c704f-9b21-4f2e-91b3-4a467353bcc0

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.2

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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:L): Some sensitive info could get out, but not a total data dump.
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

4.2

[email protected]

8.2

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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:L): Some sensitive info could get out, but not a total data dump.
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

4.2

134c704f-9b21-4f2e-91b3-4a467353bcc0

OS Trackers for CVE-2023-1668

vendor	priority	summary	link
`alpine`	—	CVE-2023-1668: 1 source package rows (openvswitch); 12 state rows across 6 repos (3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 12, open 0.	https://security.alpinelinux.org/vuln/CVE-2023-1668
`debian`	not yet assigned	CVE-2023-1668 not yet assigned priority: Debian including 1 source packages (openvswitch), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2023-1668
`gentoo`	low	CVE-2023-1668: 1 GLSA(s) (202311-16), 1 atom(s) (net-misc/openvswitch); latest impact low.	https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2023-1668
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2023-1668
`suse`	medium	CVE-2023-1668 severity moderate: SUSE including 170 source package names (libopenvswitch-2_11-0, libopenvswitch-2_11-0-2.11.5-3.18.2, …), 643 product×package rows across 49 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 7, … (49 product lines)): Fixed 537, Will Not Fix 106.	https://www.suse.com/security/cve/CVE-2023-1668/
`ubuntu`	medium	CVE-2023-1668 medium priority: Ubuntu including 1 source packages (openvswitch), 13 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): released 10, needs-triage 2, ignored 1.	https://ubuntu.com/security/CVE-2023-1668

Affected software / configurations for CVE-2023-1668

Vendor	Product	Version	Raw CPE
cloudbase	open_vswitch	>= 1.5.0, < 2.13.11	cpe:2.3:a:cloudbase:open_vswitch::::::::
cloudbase	open_vswitch	>= 2.14.0, < 2.14.9	cpe:2.3:a:cloudbase:open_vswitch::::::::
cloudbase	open_vswitch	>= 2.15.0, < 2.15.8	cpe:2.3:a:cloudbase:open_vswitch::::::::
cloudbase	open_vswitch	>= 2.16.0, < 2.16.7	cpe:2.3:a:cloudbase:open_vswitch::::::::
cloudbase	open_vswitch	>= 2.17.0, < 2.17.6	cpe:2.3:a:cloudbase:open_vswitch::::::::
cloudbase	open_vswitch	>= 3.0.0, < 3.0.4	cpe:2.3:a:cloudbase:open_vswitch::::::::
cloudbase	open_vswitch	3.1.0	cpe:2.3:a:cloudbase:open_vswitch:3.1.0:::::::*
debian	debian_linux	11.0	cpe:2.3:o:debian:debian_linux:11.0:::::::*
redhat	openshift_container_platform	4.0	cpe:2.3:a:redhat:openshift_container_platform:4.0:::::::*
redhat	openstack_platform	16.1	cpe:2.3:a:redhat:openstack_platform:16.1:::::::*
redhat	openstack_platform	16.2	cpe:2.3:a:redhat:openstack_platform:16.2:::::::*
redhat	openstack_platform	17.0	cpe:2.3:a:redhat:openstack_platform:17.0:::::::*
redhat	virtualization	4.0	cpe:2.3:a:redhat:virtualization:4.0:::::::*
redhat	fast_datapath	—	cpe:2.3:a:redhat:fast_datapath:-:::::::*

References for CVE-2023-1668

URL	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=2137666	Issue Tracking Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/05/msg00000.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V2GUNS3WSJG4TUDKZ5L7FXGJMVOD6EJZ/
https://security.gentoo.org/glsa/202311-16
https://www.debian.org/security/2023/dsa-5387	Third Party Advisory
https://www.openwall.com/lists/oss-security/2023/04/06/1	Mailing List Mitigation Patch

URL

CVE-2023-1668

Exploit prediction scoring system (EPSS) score for CVE-2023-1668

Common vulnerability scoring system (CVSS) metrics for CVE-2023-1668

Weakness enumeration for CVE-2023-1668

OS Trackers for CVE-2023-1668

Affected software / configurations for CVE-2023-1668

References for CVE-2023-1668