CVE-2023-2430

MEDIUMNVD 5.55.5—

5.5

A vulnerability was found due to missing lock for IOPOLL flaw in io_cqring_event_overflow() in io_uring.c in Linux Kernel. This flaw allows a local attacker with user privilege to trigger a Denial of Service threat.

CVSS v3: 5.5
EG Score: 5.5(medium)
EPSS: 2.3%
KEV: Not listed

Published

July 23, 2023

Last Modified

March 6, 2025

References (4)

secalert@redhathttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e12d7a46f65ae4b7d58a5e0c1cbfa825cf8
secalert@redhathttps://www.debian.org/security/2023/dsa-5492
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e12d7a46f65ae4b7d58a5e0c1cbfa825cf8
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2023/dsa-5492

Patch Availability(3)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	linux-image-lowlatency (5.19.0.1028.24) @ kinetic	2026-05-24	ubuntu
ubuntu	linux-headers-6.1.0-1015-oem (6.1.0-1015.15) @ jammy	2026-05-24	ubuntu
ubuntu	linux-tools-oem-22.04b (6.0.0.1019.19) @ jammy	2026-05-24	ubuntu

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

(4)

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 / 10× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 20:46 UTCEG score recompute
2026-05-24 20:46 UTCVendor advisory
2026-05-24 20:46 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2023-2430?

CVE-2023-2430 is a medium vulnerability published on July 23, 2023. A vulnerability was found due to missing lock for IOPOLL flaw in iocqringeventoverflow() in iouring.c in Linux Kernel. This flaw allows a local attacker with user privilege to trigger a Denial of Service threat.

When was CVE-2023-2430 disclosed?

CVE-2023-2430 was first published in the National Vulnerability Database on July 23, 2023, with the most recent update on March 6, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-2430 actively exploited?

CVE-2023-2430 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-2430?

CVE-2023-2430 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2023-2430?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-2430, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-2430

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