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Vulnerability record · CVE-2023-4004 · published 31 July 2023

CVE-2023-4004: Linux kernel use after free vulnerability

Linux · Linux Kernel

A use-after-free flaw was found in the Linux kernel's netfilter in the way a user triggers the nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. This issue could allow a local user to crash the system or potentially escalate their privileges on the system.

7.8 CVSS 3.1 High EPSS 0.92% · top 41.1% CWE-416 · Use after free
7.8CVSS 3.1 base score
0.92%EPSS exploitation probability, 30 days
NoNot in CISA KEV
8Affected product versions listed by NVD
46References
17 Jun 2026Last modified by NVD

Description

A use-after-free flaw was found in the Linux kernel's netfilter in the way a user triggers the nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. This issue could allow a local user to crash the system or potentially escalate their privileges on the system.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

8 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/errata/RHSA-2023:4961 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:4962 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:4967 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:5069 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:5091 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:5093 Broken LinkThird Party Advisory
https://access.redhat.com/errata/RHSA-2023:5221 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:5244 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:5255 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:5548 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:5627 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:7382 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:7389 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:7411 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2023:7417 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2023:7431 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2023:7434 Third Party AdvisoryVDB Entry
https://access.redhat.com/security/cve/CVE-2023-4004 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2225275 Issue TrackingThird Party Advisory
https://patchwork.ozlabs.org/project/netfilter-devel/patch/20230719190824.21196-1-fw@strlen.de/ Mailing ListPatchThird Party Advisory
http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html
http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
https://access.redhat.com/errata/RHSA-2023:4961 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:4962 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:4967 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:5069 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:5091 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:5093 Broken LinkThird Party Advisory
https://access.redhat.com/errata/RHSA-2023:5221 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:5244 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:5255 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:5548 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:5627 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:7382 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:7389 Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:7411 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2023:7417 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2023:7431 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2023:7434 Third Party AdvisoryVDB Entry
https://access.redhat.com/security/cve/CVE-2023-4004 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2023-4004), CISA KEV, FIRST EPSS (scores of 2026-10-05). This page is refreshed as NVD updates the record.