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HIGH

CVE-2023-4244

CVSS v3

7.8

HIGH

EPSS Score

0.2 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • linux-azureUbuntu:23.10all versions · fixed in 6.5.0-1009.9
  • linux-gcpUbuntu:23.10all versions · fixed in 6.5.0-1010.10

Vendor advisories

  • CVE-2023-4244 Red Hat Product Security906 products fixed · 64 known affected

    kernel: Use-after-free in nft_verdict_dump due to a race between set GC and transaction

    kernel as a component of Red Hat Enterprise Linux 6 · kernel-abi-whitelists as a component of Red Hat Enterprise Linux 6 · kernel-bootwrapper as a component of Red Hat Enterprise Linux 6

  • RHSA-2024:3421 Red Hat Product Security166 products fixed

    Red Hat Security Advisory: kernel security and bug fix update

  • RHSA-2024:3414 Red Hat Product Security30 products fixed

    Red Hat Security Advisory: kernel-rt security and bug fix update

  • RHSA-2024:2950 Red Hat Product Security30 products fixed

    Red Hat Security Advisory: kernel-rt security and bug fix update

  • RHSA-2024:3138 Red Hat Product Security120 products fixed

    Red Hat Security Advisory: kernel security, bug fix, and enhancement update

  • RHSA-2024:2094 Red Hat Product Security59 products fixed

    Red Hat Security Advisory: security update Logging for Red Hat OpenShift - 5.8.6

3 more advisories

Full record on NVD

Description

A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. Due to a race condition between nf_tables netlink control plane transaction and nft_set element garbage collection, it is possible to underflow the reference counter causing a use-after-free vulnerability. We recommend upgrading past commit 3e91b0ebd994635df2346353322ac51ce84ce6d8.

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
2023-08-28
Last Modified
2026-07-28

Frequently asked questions

What is CVE-2023-4244?

A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. Due to a race condition between nf_tables netlink control plane transaction and nft_set element garbage collection, it is possible to underflow the reference counter causing a use-after-free vulnerability. We recommend upgrading past commit 3e91b0ebd994635df2346353322ac51ce84ce6d8.

Is CVE-2023-4244 actively exploited?

Active exploitation of CVE-2023-4244 has not been confirmed. Its EPSS score was 0.2% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-4244?

CVE-2023-4244 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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