CVE-2022-33740

HIGHNVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2022-07-06. NVD baseline CVSS 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.1Exploit: NoneExposed: 0

A fix is available — apply it.

Linux disk/nic frontends data leaks T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Linux Block and Network PV device frontends don't zero memory regions before sharing them with the backend (CVE-2022-26365, CVE-2022-33740). Additionally the granularity of the grant table doesn't allow sharing less than a 4K page, leading to unrelated data residing in the same 4K page as data shared with a backend being accessible by such backend (CVE-2022-33741, CVE-2022-33742).

CVSS v3
7.1
EG Score
7.1(medium)
EPSS
24.5%
KEV
Not listed

Published

July 5, 2022

Last Modified

November 21, 2024

References (14)

Patch Availability(23)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-aws-headers-4.4.0-1148 (4.4.0-1148.163) @ xenial2026-05-25ubuntu
ubuntulinux-image-lowlatency (4.4.0.233.239) @ xenial2026-05-25ubuntu
ubuntulinux-tools-4.4.0-1112-aws (4.4.0-1112.118) @ trusty2026-05-25ubuntu
ubuntulinux-image-5.15.0-1018-kvm (5.15.0-1018.22) @ jammy2026-05-25ubuntu
ubuntulinux-modules-extra-gkeop-5.15 (5.15.0.1003.5) @ jammy2026-05-25ubuntu
ubuntulinux-image-unsigned-5.15.0-1016-gke (5.15.0-1016.19) @ jammy2026-05-25ubuntu
ubuntulinux-tools-5.15.0-1018-gcp (5.15.0-1018.24~20.04.1) @ focal2026-05-25ubuntu
ubuntulinux-tools-5.15.0-1018-oracle (5.15.0-1018.23) @ jammy2026-05-25ubuntu
ubuntulinux-headers-lowlatency-64k-hwe-20.04-edge (5.15.0.48.54~20.04.16) @ focal2026-05-25ubuntu
ubuntulinux-headers-5.15.0-1016-gke (5.15.0-1016.19~20.04.1) @ focal2026-05-25ubuntu
ubuntulinux-intel-iotg-headers-5.15.0-1016 (5.15.0-1016.21) @ jammy2026-05-25ubuntu
ubuntulinux-image-lowlatency (5.4.0.128.129) @ focal2026-05-25ubuntu
ubuntulinux-signed-image-lowlatency-hwe-16.04-edge (4.15.0.194.179) @ bionic2026-05-25ubuntu
ubuntulinux-tools-virtual-hwe-16.04 (4.15.0.194.181) @ xenial2026-05-25ubuntu
ubuntulinux-aws-headers-4.15.0-1142 (4.15.0-1142.154~16.04.1) @ xenial2026-05-25ubuntu
ubuntulinux-image-unsigned-4.15.0-1142-aws (4.15.0-1142.154) @ bionic2026-05-25ubuntu
ubuntulinux-image-raspi2-hwe-18.04 (5.4.0.1071.104) @ focal2026-05-25ubuntu
ubuntulinux-signed-image-azure (4.15.0.1153.140) @ xenial2026-05-25ubuntu
ubuntulinux-headers-azure-fde (5.4.0.1092.97+cvm1.32) @ focal2026-05-25ubuntu
ubuntulinux-headers-5.4.0-1086-aws (5.4.0-1086.93~18.04.1) @ bionic2026-05-25ubuntu
ubuntulinux-gcp (4.15.0.1137.131) @ xenial2026-05-25ubuntu
ubuntulinux-image-unsigned-5.15.0-1015-ibm (5.15.0-1015.17) @ jammy2026-05-25ubuntu
ubuntulinux-image-azure-lts-18.04 (4.15.0.1153.123) @ bionic2026-05-25ubuntu

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

(23)

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 10× 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 106 total refreshes for this CVE.

  1. 2026-07-22 22:59 UTCEG score recompute
  2. 2026-07-22 14:06 UTCEPSS rescore
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Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2022-33740?
CVE-2022-33740 is a high vulnerability published on July 5, 2022. Linux disk/nic frontends data leaks T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Linux Block and Network PV device frontends don't zero memory regions before sharing them with the backend (CVE-2022-26365,…
When was CVE-2022-33740 disclosed?
CVE-2022-33740 was first published in the National Vulnerability Database on July 5, 2022, 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-2022-33740 actively exploited?
CVE-2022-33740 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 24.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2022-33740?
CVE-2022-33740 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2022-33740?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-33740, 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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