ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2023-4004

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.

Published Jul 31, 2023 · catalog updated Oct 14, 2026 · Red Hat Red Hat Enterprise Linux 8

Check if you run it

No confirmed exploitation is on record for CVE-2023-4004. EPSS is 0.92%. Act only if a listed version of Red Hat Red Hat Enterprise Linux 8 is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.92%
Remediation
Advisory link
Affected products
cpe debian/debian linux · cpe fedoraproject/fedora · cpe linux/linux kernel · cpe netapp/h300s · cpe redhat/enterprise linux · vendor Red Hat Red Hat Enterprise Linux 8

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe debian/debian linux10.0
  • cpe fedoraproject/fedora38
  • cpe linux/linux kernelversion unspecified
  • cpe netapp/h300sversion unspecified
  • cpe redhat/enterprise linux8.0
  • cpe redhat/enterprise linux9.0
  • vendor Red Hat Red Hat Enterprise Linux 8version unspecified
  • vendor Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Supportversion unspecified
  • vendor Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Serviceversion unspecified
  • vendor Red Hat Red Hat Enterprise Linux 8.2 Update Services for SAP Solutionsversion unspecified

How to fix CVE-2023-4004

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2023-4004. EPSS is 0.92%. Act only if a listed version of Red Hat Red Hat Enterprise Linux 8 is installed.

Which versions are affected?

Compare what you have installed with debian/debian linux 10.0; redhat/enterprise linux 8.0; redhat/enterprise linux 9.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-416: Use After Free. EPSS 0.92%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 31, 2023 · NIST NVD

    Detected

    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.

  2. Oct 14, 2026 · NIST NVD

    Updated

    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.

Sources

  • CIRCL Vulnerability LookupVulnerability recordCVE-2023-4004

    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 syste

    vulnerability.circl.lu
  • CVE.orgVulnerability recordCVE-2023-4004

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-4004

    30-day exploitation probability 0.9%

    first.org
  • NIST NVDVulnerability recordCVE-2023-4004

    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 syste

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.