CVE-2022-42720

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2022-10-14. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekElevated
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

Various refcounting bugs in the multi-BSS handling in the mac80211 stack in the Linux kernel 5.1 through 5.19.x before 5.19.16 could be used by local attackers (able to inject WLAN frames) to trigger use-after-free conditions to potentially execute code.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
51(Track*)
EG Risk 51/100SSVC: 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
Severity78% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS
52.7%
KEV
Not listed

Published

October 14, 2022

Last Modified

May 15, 2025

References (20)

Vendor Advisories for CVE-2022-42720(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(12)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-headers-oem-22.04 (5.17.0.1020.19) @ jammy2026-05-25ubuntu
ubuntulowlatency-5.4 (5.4.0-26) @ bionic2026-05-25ubuntu
ubuntulinux-image-5.15.0-1024-azure-fde (5.15.0-1024.30.1) @ jammy2026-05-25ubuntu
ubuntulinux-image-unsigned-5.4.0-1086-gke (5.4.0-1086.93) @ focal2026-05-25ubuntu
ubuntulinux-image-unsigned-5.15.0-1019-gke (5.15.0-1019.23) @ jammy2026-05-25ubuntu
ubuntulinux-image-5.19.0-23-generic-lpae (5.19.0-23.24) @ kinetic2026-05-25ubuntu
ubuntubackport-iwlwifi-dkms (9904-0ubuntu3.1) @ kinetic2026-05-25ubuntu
redhatkernel-0:4.18.0-372.95.1.el8_62024-03-06redhat
redhatkernel-0:4.18.0-477.10.1.el8_82023-05-16redhat
redhatkernel-rt-0:4.18.0-477.10.1.rt7.274.el8_82023-05-16redhat
redhatkernel-0:5.14.0-284.11.1.el9_22023-05-09redhat
redhatkernel-rt-0:5.14.0-284.11.1.rt14.296.el9_22023-05-09redhat

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(1)

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

Additional Vendor Advisories

(11)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 12× in last 7d / 44× 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 101 total refreshes for this CVE.

  1. 2026-07-23 02:14 UTCEG score recompute
  2. 2026-07-22 23:02 UTCEG score recompute
  3. 2026-07-22 14:06 UTCEPSS rescore
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  9. 2026-06-28 16:32 UTCOSV refresh
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  39. 2026-06-11 06:39 UTCOSV refresh
  40. 2026-06-10 22:17 UTCEPSS rescore
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  73. 2026-05-25 13:51 UTCEG score recompute
  74. 2026-05-25 13:51 UTCVendor advisory
  75. 2026-05-25 13:51 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2022-42720?
CVE-2022-42720 is a high vulnerability published on October 14, 2022. Various refcounting bugs in the multi-BSS handling in the mac80211 stack in the Linux kernel 5.1 through 5.19.x before 5.19.16 could be used by local attackers (able to inject WLAN frames) to trigger use-after-free conditions to potentially execute code.
When was CVE-2022-42720 disclosed?
CVE-2022-42720 was first published in the National Vulnerability Database on October 14, 2022, with the most recent update on May 15, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-42720 actively exploited?
CVE-2022-42720 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 52.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2022-42720?
CVE-2022-42720 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2022-42720?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-42720, 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.

Dependency Blast Radius

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