CVE-2023-32233

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2023-05-08. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 13%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

In the Linux kernel through 6.3.1, a use-after-free in Netfilter nf_tables when processing batch requests can be abused to perform arbitrary read and write operations on kernel memory. Unprivileged local users can obtain root privileges. This occurs because anonymous sets are mishandled.

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: Routine — remediate on your standard cadence.
EPSS
95.9%
KEV
Not listed

Published

May 8, 2023

Last Modified

May 5, 2025

References (22)

Vendor Advisories for CVE-2023-32233(2)

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

Patch Availability(23)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-headers-bluefield (5.4.0.1064.59) @ focal2026-05-25ubuntu
ubuntulinux-cloud-tools-6.2.0-23 (6.2.0-23.23) @ lunar2026-05-25ubuntu
ubuntuibm (5.4.0-1009) @ focal2026-05-25ubuntu
ubuntulinux-tools-5.15.0-1031-intel-iotg (5.15.0-1031.36~20.04.1) @ focal2026-05-25ubuntu
ubuntulinux-tools-iot (5.4.0.1017.15) @ focal2026-05-25ubuntu
redhatkernel-0:3.10.0-1160.102.1.el72023-10-10redhat
redhatkpatch-patch2023-10-10redhat
redhatkernel-rt-0:3.10.0-1160.102.1.rt56.1250.el72023-10-10redhat
redhatkernel-0:3.10.0-1062.79.1.el72023-10-03redhat
redhatkernel-0:3.10.0-957.105.1.el72023-08-22redhat
redhatkernel-0:3.10.0-693.112.1.el72023-08-22redhat
redhatkernel-0:4.18.0-305.97.1.el8_42023-07-25redhat
redhatkernel-rt-0:4.18.0-305.97.1.rt7.172.el8_42023-07-25redhat
redhatkernel-0:4.18.0-372.64.1.el8_62023-07-18redhat
redhatkernel-rt-0:4.18.0-193.109.1.rt13.160.el8_22023-07-18redhat
redhatkernel-0:4.18.0-193.109.1.el8_22023-07-18redhat
redhatkernel-0:4.18.0-147.85.1.el8_12023-06-27redhat
redhatkernel-0:5.14.0-284.18.1.el9_22023-06-21redhat
redhatkernel-rt-0:5.14.0-284.18.1.rt14.303.el9_22023-06-21redhat
redhatkernel-0:5.14.0-70.58.1.el9_02023-06-06redhat
redhatkernel-rt-0:5.14.0-70.58.1.rt21.129.el9_02023-06-06redhat
redhatkernel-rt-0:4.18.0-477.13.1.rt7.276.el8_82023-05-30redhat
redhatkernel-0:4.18.0-477.13.1.el8_82023-05-30redhat

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

(23)

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 13× in last 7d / 49× 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 107 total refreshes for this CVE.

  1. 2026-07-23 02:22 UTCEG score recompute
  2. 2026-07-22 23:09 UTCEG score recompute
  3. 2026-07-22 14:06 UTCEPSS rescore
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Publicly available exploits

(3 references)

Working exploit code is in the public domain (3 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCLiuk3r/CVE-2023-32233
    First seen May 16, 2023

    CVE-2023-32233: Linux内核中的安全漏洞

    Open source ↗
  • GitHub PoCoferchen/POC-CVE-2023-32233
    First seen May 16, 2023

    Use-After-Free in Netfilter nf_tables when processing batch requests CVE-2023-32233

    Open source ↗
  • GitHub PoCPIDAN-HEIDASHUAI/CVE-2023-32233
    First seen May 16, 2023

    自用，poc作者为Piotr Krysiuk，在使用前请先阅读README.md

    Open source ↗

Frequently asked(5)

What is CVE-2023-32233?
CVE-2023-32233 is a high vulnerability published on May 8, 2023. In the Linux kernel through 6.3.1, a use-after-free in Netfilter nf_tables when processing batch requests can be abused to perform arbitrary read and write operations on kernel memory. Unprivileged local users can obtain root privileges. This occurs because anonymous sets are mishandled.
When was CVE-2023-32233 disclosed?
CVE-2023-32233 was first published in the National Vulnerability Database on May 8, 2023, with the most recent update on May 5, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-32233 actively exploited?
CVE-2023-32233 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 95.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-32233?
CVE-2023-32233 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2023-32233?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-32233, 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

Explore the affected products and dependency analysis for CVE-2023-32233

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