CVE-2022-4338 [Critical] | Out-of-bounds Read in Openvswitch

CVE-2022-4338 is rated Moderate Risk (63.4/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.32%). Review affected assets and schedule remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.64%	1.32%	+0.68%
2	2026-05-31	0.68%	0.64%	-0.04%
3	2026-05-13	—	0.68%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.64%

1.32%

+0.68%

2026-05-31

0.68%

0.64%

-0.04%

2026-05-13

—

0.68%

—

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]

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]

OS Trackers for CVE-2022-4338

vendor	priority	summary	link
`alpine`	critical	CVE-2022-4338: 1 source package rows (openvswitch); 18 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 6, open 12.	https://security.alpinelinux.org/vuln/CVE-2022-4338
`debian`	not yet assigned	CVE-2022-4338 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-2022-4338
`gentoo`	low	CVE-2022-4338: 1 GLSA(s) (202311-16), 1 atom(s) (net-misc/openvswitch); latest impact low.	https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2022-4338
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2022-4338
`suse`	high	CVE-2022-4338 severity important: SUSE including 130 source package names (libopenvswitch-2_11-0-2.11.5-150100.3.21.1, libopenvswitch-2_11-0-2.11.5-3.15.1, …), 396 product×package rows across 38 product lines (SUSE Enterprise Storage 7, SUSE Enterprise Storage 7.1, … (38 product lines)): Fixed 381, Known Not Affected 15.	https://www.suse.com/security/cve/CVE-2022-4338/
`ubuntu`	medium	CVE-2022-4338 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): not-affected 6, released 5, ignored 1, needs-triage 1.	https://ubuntu.com/security/CVE-2022-4338

Affected software / configurations for CVE-2022-4338

Vendor	Product	Version	Raw CPE
openvswitch	openvswitch	< 2.13.10	cpe:2.3:a:openvswitch:openvswitch::::::::
openvswitch	openvswitch	>= 2.14.0, < 2.14.8	cpe:2.3:a:openvswitch:openvswitch::::::::
openvswitch	openvswitch	>= 2.15.0, < 2.15.7	cpe:2.3:a:openvswitch:openvswitch::::::::
openvswitch	openvswitch	>= 2.16.0, < 2.16.6	cpe:2.3:a:openvswitch:openvswitch::::::::
openvswitch	openvswitch	>= 2.17.0, < 2.17.5	cpe:2.3:a:openvswitch:openvswitch::::::::
openvswitch	openvswitch	>= 3.0.0, < 3.0.3	cpe:2.3:a:openvswitch:openvswitch::::::::
debian	debian_linux	11.0	cpe:2.3:o:debian:debian_linux:11.0:::::::*

References for CVE-2022-4338

URL	Tags
https://github.com/openvswitch/ovs/pull/405	Patch Third Party Advisory
https://mail.openvswitch.org/pipermail/ovs-dev/2022-December/400596.html	Mailing List Patch Vendor Advisory
https://security.gentoo.org/glsa/202311-16
https://www.debian.org/security/2023/dsa-5319	Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/12/21/4	Mailing List Third Party Advisory

URL

CVE-2022-4338

Exploit prediction scoring system (EPSS) score for CVE-2022-4338

Common vulnerability scoring system (CVSS) metrics for CVE-2022-4338

Weakness enumeration for CVE-2022-4338

OS Trackers for CVE-2022-4338

Affected software / configurations for CVE-2022-4338

References for CVE-2022-4338