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TI-2023-03930 Aliases CVE-2023-4244GHSA-396p-373f-r9vm

Use-after-free in Linux kernel's netfilter: nf_tables component

Priority LOW 34CWE-416Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 20 fixed, 3 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.00241 15th percentileScored 2026-11-07
Fix Partial Kernel (Linux): 4.19.316, 5.4.262, 5.10.198 +3Red Hat: 8 advisoriesRed Hat: 20 fixed, 3 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxKernel0.0 to before 4.19.316; 4.20 to before 5.4.262; 5.5 to before 5.10.198; 5.11 to before 5.15.134; 5.16 to before 6.1.56; 6.2 to before 6.4.114.19.316, 5.4.262, 5.10.198, 5.15.134, 6.1.56, 6.4.11Patch availableCNA
  • Kernel VendorLinux Affected 0.0 to before 4.19.316; 4.20 to before 5.4.262; 5.5 to before 5.10.198; 5.11 to before 5.15.134; 5.16 to before 6.1.56; 6.2 to before 6.4.11 Fixed in 4.19.316, 5.4.262, 5.10.198, 5.15.134, 6.1.56, 6.4.11 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 4.19.316; 4.20 to before 5.4.262; 5.5 to before 5.10.198; 5.11 to before 5.15.134; 5.16 to before 6.1.56; 6.2.0 to before 6.4.11VulnerableLinux
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 4.19.316; 4.20 to before 5.4.262; 5.5 to before 5.10.198; 5.11 to before 5.15.134; 5.16 to before 6.1.56; 6.2.0 to before 6.4.11 Vulnerable ·Linux
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian

Remediation

  • Fix · CNA Kernel (Linux) Fixed in 4.19.316, 5.4.262, 5.10.198, 5.15.134, 6.1.56, 6.4.11

Red Hat 8 advisories

  • RHSA-2024:3421 Released 2024-05-28 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder EUS (v.9.0) kernel-tools-libs-devel-5.14.0-70.101.1.el9_0
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) kernel-debug-devel-5.14.0-70.101.1.el9_0, kernel-debug-devel-matched-5.14.0-70.101.1.el9_0, kernel-devel-5.14.0-70.101.1.el9_0 +5
    • Red Hat Enterprise Linux BaseOS EUS (v.9.0) bpftool-5.14.0-70.101.1.el9_0, kernel-5.14.0-70.101.1.el9_0, kernel-abi-stablelists-5.14.0-70.101.1.el9_0 +14
  • RHSA-2024:3414 Released 2024-05-28 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Real Time EUS (v.9.0) kernel-rt-5.14.0-70.101.1.rt21.173.el9_0, kernel-rt-core-5.14.0-70.101.1.rt21.173.el9_0, kernel-rt-debug-5.14.0-70.101.1.rt21.173.el9_0 +7
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0) kernel-rt-5.14.0-70.101.1.rt21.173.el9_0, kernel-rt-core-5.14.0-70.101.1.rt21.173.el9_0, kernel-rt-debug-5.14.0-70.101.1.rt21.173.el9_0 +9
  • RHSA-2024:2950 Released 2024-05-22 · Red Hat rating Moderate
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.rt7.342.el8_10, kernel-rt-core-4.18.0-553.rt7.342.el8_10, kernel-rt-debug-4.18.0-553.rt7.342.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.rt7.342.el8_10, kernel-rt-core-4.18.0-553.rt7.342.el8_10, kernel-rt-debug-4.18.0-553.rt7.342.el8_10 +7
Show 5 more Red Hat advisories
  • RHSA-2024:3138 Released 2024-05-22 · Red Hat rating Moderate
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.el8_10, kernel-4.18.0-553.el8_10, kernel-abi-stablelists-4.18.0-553.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.el8_10
  • RHSA-2024:2094 Released 2024-05-01 · Red Hat rating Moderate
    security update Logging for Red Hat OpenShift - 5.8.6
    • RHOL 5.8 for RHEL 9 openshift-logging/cluster-logging-operator-bundle, openshift-logging/cluster-logging-rhel9-operator, openshift-logging/elasticsearch-operator-bundle +14
  • RHSA-2024:1248 Released 2024-03-12 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-362.24.1.el9_3, libperf-5.14.0-362.24.1.el9_3
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-362.24.1.el9_3, kernel-64k-debug-devel-matched-5.14.0-362.24.1.el9_3, kernel-64k-devel-5.14.0-362.24.1.el9_3 +11
    • Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.2.0-362.24.1.el9_3, kernel-5.14.0-362.24.1.el9_3, kernel-64k-5.14.0-362.24.1.el9_3 +29
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-362.24.1.el9_3, kernel-rt-core-5.14.0-362.24.1.el9_3, kernel-rt-debug-5.14.0-362.24.1.el9_3 +9
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-362.24.1.el9_3, kernel-rt-core-5.14.0-362.24.1.el9_3, kernel-rt-debug-5.14.0-362.24.1.el9_3 +11
  • RHSA-2024:1018 Released 2024-02-28 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-tools-libs-devel-5.14.0-284.55.1.el9_2
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-64k-debug-devel-5.14.0-284.55.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.55.1.el9_2, kernel-64k-devel-5.14.0-284.55.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool-7.0.0-284.55.1.el9_2, kernel-5.14.0-284.55.1.el9_2, kernel-64k-5.14.0-284.55.1.el9_2 +29
  • RHSA-2024:1019 Released 2024-02-28 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt-5.14.0-284.55.1.rt14.340.el9_2, kernel-rt-core-5.14.0-284.55.1.rt14.340.el9_2, kernel-rt-debug-5.14.0-284.55.1.rt14.340.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt-5.14.0-284.55.1.rt14.340.el9_2, kernel-rt-core-5.14.0-284.55.1.rt14.340.el9_2, kernel-rt-debug-5.14.0-284.55.1.rt14.340.el9_2 +11

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 9AffectedNo fix yet
RHOL 5.8 for RHEL 9Fixed RHSA-2024:2094
Red Hat CodeReady Linux Builder (v. 9)Fixed RHSA-2024:1248
Red Hat CodeReady Linux Builder EUS (v.9.0)Fixed RHSA-2024:3421
Red Hat CodeReady Linux Builder EUS (v.9.2)Fixed RHSA-2024:1018
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2024:1248
Red Hat Enterprise Linux AppStream EUS (v.9.0)Fixed RHSA-2024:3421
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2024:1018
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2024:3138
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2024:1248
Red Hat Enterprise Linux BaseOS EUS (v.9.0)Fixed RHSA-2024:3421
Red Hat Enterprise Linux BaseOS EUS (v.9.2)Fixed RHSA-2024:1018
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2024:3138
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2024:2950
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2024:2950
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2024:1248
Red Hat Enterprise Linux Real Time EUS (v.9.0)Fixed RHSA-2024:3414
Red Hat Enterprise Linux Real Time EUS (v.9.2)Fixed RHSA-2024:1019
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2024:1248
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)Fixed RHSA-2024:3414
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2)Fixed RHSA-2024:1019
Not affected: 1 product
  • Red Hat Enterprise Linux AppStream EUS (v.9.2)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-4244
  2. 2026-10-03 Alias added: GHSA-396p-373f-r9vm

References

Patch 2

Advisory 2

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences