Public proof of conceptFix available

CVE-2023-2598

Q: Is CVE-2023-2598 actively exploited?

Active exploitation of CVE-2023-2598 has not been confirmed. Its EPSS score was 1.4% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2023-2598?

CVE-2023-2598 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

A public proof of concept exists; no exploitation attested.

Published2023-06-01
WeaknessCWE-416 · CWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A flaw was found in the fixed buffer registration code for io_uring (io_sqe_buffer_register in io_uring/rsrc.c) in the Linux kernel that allows out-of-bounds access to physical memory beyond the end of the buffer. This flaw enables full local privilege escalation.

Timeline

dates in UTC

2023-06-0101:15CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-2598?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-2598?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Netapp hci baseboard management controller

Branch	Affected	Fixed in	Source
—	= h300s	no fix published	NVD
—	= h410c	no fix published	NVD
—	= h410s	no fix published	NVD
—	= h500s	no fix published	NVD
—	= h700s	no fix published	NVD

Linux linux kernel

Branch	Affected	Fixed in	Source
6.3	≥ 6.3, < 6.3.2	6.3.2	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

No fix published by the sources we read yet. NVD record

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 4 repositories, unverifiedysanatomic/io_uring_LPE-CVE-2023-2598cainiao159357/CVE-2023-2598LLfam/CVE-2023-2598SpongeBob-369/CVE-2023-2598

Sources

CISA-ADPSSVC decisionnone2025-04-23
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.17.8read 2026-10-23
NVDCVSS 3.17.8read 2026-10-23
CNAweakness (CWE)CWE-416read 2026-10-23
NVDweakness (CWE)CWE-787read 2026-10-23
FIRST EPSSEPSS score1.4 %2026-10-23
PoC-in-GitHubproof of concept4read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2023-06-01
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-2598?

Is CVE-2023-2598 actively exploited?

Active exploitation of CVE-2023-2598 has not been confirmed. Its EPSS score was 1.4% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-2598?

CVE-2023-2598 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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