CVE-2022-4338

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2023-01-11. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

A fix is available — apply it.

An integer underflow in Organization Specific TLV was found in various versions of OpenvSwitch.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
68%
KEV
Not listed

Published

January 10, 2023

Last Modified

November 21, 2024

Advisory Details (5)

Auto-updated May 29, 2026
No patch confirmed yet. Sources: github_pr.
generic

oss-security - Re: [ADVISORY] LLDP underflow while parsing malformed Auto Attach TLV (Open vSwitch)

https://www.openwall.com/lists/oss-security/2022/12/21/4
generic

[SECURITY] [DSA 5319-1] openvswitch security update

https://www.debian.org/security/2023/dsa-5319
generic

Open vSwitch: Multiple Vulnerabilities (GLSA 202311-16) — Gentoo security

https://security.gentoo.org/glsa/202311-16
generic

[ovs-dev] [PATCH v2] lldp: fix bugs when parsing malformed AutoAttach

https://mail.openvswitch.org/pipermail/ovs-dev/2022-December/400596.html
github_pr

fix bugs when parsing malformed LLDP packets

Upstream fix in progress (PR #405 · openvswitch/ovs, state=closed)

https://github.com/openvswitch/ovs/pull/405

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuopenvswitch-test (3.0.3-0ubuntu0.22.10.2) @ kinetic2026-05-25ubuntu
redhatopenvswitch2.16-0:2.16.0-111.el8fdp2023-02-09redhat
redhatopenvswitch2.17-0:2.17.0-62.el9fdp2023-02-09redhat
redhatopenvswitch2.13-0:2.13.0-212.el8fdp2023-02-09redhat
redhatopenvswitch2.15-0:2.15.0-133.el8fdp2023-02-09redhat
redhatopenvswitch2.17-0:2.17.0-71.el8fdp2023-02-09redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(7)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 12× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 110 total refreshes for this CVE.

  1. 2026-07-26 14:52 UTCEPSS rescore
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  7. 2026-07-23 02:14 UTCEG score recompute
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  48. 2026-06-11 13:58 UTCEPSS rescore
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  50. 2026-06-10 19:47 UTCOSV refresh
  51. 2026-06-10 13:21 UTCEPSS rescore
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  75. 2026-05-27 13:39 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2022-4338?
CVE-2022-4338 is a critical vulnerability published on January 10, 2023. An integer underflow in Organization Specific TLV was found in various versions of OpenvSwitch.
When was CVE-2022-4338 disclosed?
CVE-2022-4338 was first published in the National Vulnerability Database on January 10, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-4338 actively exploited?
CVE-2022-4338 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 32.0% of all scored CVEs.
What is the CVSS score of CVE-2022-4338?
CVE-2022-4338 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2022-4338?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-4338, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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