CVE-2022-32166

HIGHNVD 6.18.8
EchelonGraph scoreMEDIUM confidence

“▲” beside the score: it is higher than NVD's CVSS score.

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-09-29. NVD baseline CVSS 6.1; sources differ by 2.7.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this week

Also known asEUVD-2022-53397 (ENISA EUVD) · GHSA-3q99-mmr6-6chg (GitHub Security Advisories)Source: ENISA EUVD

8.8EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 6.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Fixed versions, as the CVE record's CNA (Mend) states them: "Update version to v2.5.1 or later".

In ovs versions v0.90.0 through v2.5.0 are vulnerable to heap buffer over-read in flow.c. An unsafe comparison of “minimasks” function could lead access to an unmapped region of memory. This vulnerability is capable of crashing the software, memory modification, and possible remote execution.

CVSS v3
6.1
EG Score
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity88% × 45%
Impact severity (EG Severity): CVSS 8.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.6% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.6%
EPSS %ILE
49th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (8.8): severity, escalated by confirmed exploitation. This CVE's 8.8 is its impact severity (EG Severity), not escalated.

EG Severity
8.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 28, 2022

Last Modified

May 21, 2025

Advisory Details (3)

Auto-updated Oct 28, 2026
Patch available. Sources: github_commit.
Web page

CVE-2022-32166 | Mend Vulnerability Database

https://www.mend.io/vulnerability-database/CVE-2022-32166
Web pageMentions a patch (unverified)

[SECURITY] [DLA 3168-1] openvswitch security update

https://lists.debian.org/debian-lts-announce/2022/10/msg00036.html
GitHub commit

commit 2ed6505555cd (cloudbase/ovs)

Fix landed in cloudbase/ovs commit 2ed6505555cd — awaiting tagged release

https://github.com/cloudbase/ovs/commit/2ed6505555cdcb46f9b1f0329d1491b75290fc73

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuopenvswitch-test (2.5.9-0ubuntu0.16.04.3+esm1) @ xenial2026-10-21ubuntu
ubuntuopenvswitch-test (2.9.8-0ubuntu0.18.04.3) @ bionic2026-10-21ubuntu

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.

Affected Packages

(5 across 5 ecosystems)
Debian:10(1)
PackageVulnerable rangeFix by version rangeDependents
openvswitch2.10.0+2018.08.28+git.8ca7c82b7d+ds1-12 ... 2.10.7+ds1-0+deb10u1 (6 versions)
  • every version up to 2.10.7+ds1-0+deb10u2: fixed in 2.10.7+ds1-0+deb10u2
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
openvswitch—
  • every version up to 2.13.0+dfsg1-1: fixed in 2.13.0+dfsg1-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
openvswitch—
  • every version up to 2.13.0+dfsg1-1: fixed in 2.13.0+dfsg1-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
openvswitch—
  • every version up to 2.13.0+dfsg1-1: fixed in 2.13.0+dfsg1-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
openvswitch—
  • every version up to 2.13.0+dfsg1-1: fixed in 2.13.0+dfsg1-1
—

Weakness Classification(1)

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

All Vendor Advisories

(2)

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 9× in last 7d / 40× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 223 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 124 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:38 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  2. 2026-11-01 16:30 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  3. 2026-10-31 16:29 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  4. 2026-10-30 16:30 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  5. 2026-10-29 16:29 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  6. 2026-10-28 16:28 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  7. 2026-10-28 02:02 UTCEG score recompute
  8. 2026-10-28 02:02 UTCGHSA enrichmentGHSA-3q99-mmr6-6chg · GitHub severity HIGH · GitHub CVSS 8.8
  9. 2026-10-27 16:28 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  10. 2026-10-26 16:28 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  11. 2026-10-25 18:07 UTCEG score recompute
  12. 2026-10-25 16:29 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  13. 2026-10-24 16:29 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  14. 2026-10-23 16:28 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  15. 2026-10-22 16:30 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  16. 2026-10-21 16:28 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  17. 2026-10-21 07:09 UTCEG score recompute
  18. 2026-10-21 07:09 UTCVendor advisory
  19. 2026-10-21 07:09 UTCGHSA enrichmentGHSA-3q99-mmr6-6chg · GitHub severity HIGH · GitHub CVSS 8.8
  20. 2026-10-20 16:29 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  21. 2026-10-19 16:28 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  22. 2026-10-18 16:28 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  23. 2026-10-18 08:34 UTCEG score recompute
  24. 2026-10-17 16:29 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  25. 2026-10-16 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
Show 74 more
  1. 2026-10-15 16:54 UTCOSV refresh
  2. 2026-10-15 16:28 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  3. 2026-10-14 16:29 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  4. 2026-10-13 16:29 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  5. 2026-10-12 18:53 UTCEG score recompute
  6. 2026-10-12 16:30 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  7. 2026-10-11 23:18 UTCEG score recompute
  8. 2026-10-11 13:44 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  9. 2026-10-10 19:56 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  10. 2026-10-09 20:04 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  11. 2026-10-08 16:40 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  12. 2026-10-07 23:45 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  13. 2026-10-06 15:14 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  14. 2026-10-05 17:40 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  15. 2026-10-04 23:19 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  16. 2026-10-03 14:23 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  17. 2026-10-02 16:23 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  18. 2026-09-30 15:56 UTCEG score recompute
  19. 2026-09-30 15:00 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  20. 2026-09-29 15:16 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  21. 2026-09-28 13:48 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  22. 2026-09-27 13:42 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  23. 2026-09-26 15:54 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  24. 2026-09-26 00:22 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  25. 2026-09-24 14:00 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  26. 2026-09-24 10:26 UTCOSV refresh
  27. 2026-09-23 13:45 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  28. 2026-09-22 14:44 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  29. 2026-09-20 20:13 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  30. 2026-09-19 15:38 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  31. 2026-09-18 19:24 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  32. 2026-09-16 14:05 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  33. 2026-09-15 03:06 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  34. 2026-09-13 16:44 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  35. 2026-09-12 14:57 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  36. 2026-09-11 14:49 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  37. 2026-09-11 09:33 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  38. 2026-09-08 21:57 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  39. 2026-09-07 15:58 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  40. 2026-09-06 13:45 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  41. 2026-09-05 15:25 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  42. 2026-09-05 03:14 UTCOSV refresh
  43. 2026-09-04 13:57 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  44. 2026-09-04 05:04 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  45. 2026-09-02 14:09 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  46. 2026-09-01 13:51 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  47. 2026-08-30 19:14 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  48. 2026-08-30 01:19 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  49. 2026-08-28 21:38 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  50. 2026-08-27 14:22 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  51. 2026-08-26 14:43 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  52. 2026-08-25 13:46 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  53. 2026-08-24 14:13 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  54. 2026-08-23 00:16 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  55. 2026-08-21 23:46 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  56. 2026-08-20 22:52 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  57. 2026-08-19 17:01 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  58. 2026-08-18 14:10 UTCOSV refresh
  59. 2026-08-18 13:45 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  60. 2026-08-17 13:44 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  61. 2026-08-16 14:53 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  62. 2026-08-16 02:11 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  63. 2026-08-15 01:27 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  64. 2026-08-13 21:57 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  65. 2026-08-12 13:48 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  66. 2026-08-11 13:38 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  67. 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  68. 2026-08-08 16:34 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  69. 2026-08-07 16:24 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  70. 2026-08-06 13:44 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  71. 2026-08-05 19:15 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  72. 2026-08-04 15:07 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  73. 2026-08-04 10:35 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  74. 2026-08-03 10:33 UTCEPSS rescoreEPSS 0.6% · 43rd percentile

Frequently asked(5)

What is CVE-2022-32166?
CVE-2022-32166 is a high-severity vulnerability; its CVE record was published on September 28, 2022. In ovs versions v0.90.0 through v2.5.0 are vulnerable to heap buffer over-read in flow.c. An unsafe comparison of “minimasks” function could lead access to an unmapped region of memory. This vulnerability is capable of crashing the software, memory modification, and possible remote execution.
When was CVE-2022-32166 made public?
CVE-2022-32166 was made public on June 1, 2022: that is the date its CVE record's CNA, Mend, gives for when the vulnerability was made public. The CVE record itself was published on September 28, 2022. EchelonGraph's copy of the record carries a last-modified date of May 21, 2025; the record at its source may have been updated since.
Is CVE-2022-32166 actively exploited?
CVE-2022-32166 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (49th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2022-32166?
CVE-2022-32166 has a CVSS v3 base score of 6.1 (NVD). EchelonGraph synthesises NVD + FIRST EPSS + GHSA into a combined EG score of 8.8 (HIGH).
How do I remediate CVE-2022-32166?
A fix for CVE-2022-32166 is available: update to the fixed version the vendor names in its advisory. Fixed versions, as the CVE record's CNA (Mend) states them: "Update version to v2.5.1 or later".

Dependency Blast Radius

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