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TI-2023-03727 Aliases CVE-2023-4015GHSA-5m5v-w78j-286f

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: 10 fixed, 1 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. On an error when building a nftables rule, deactivating immediate expressions in nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but later used. We recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2.

Why it matters now

EPSS 0.00292 21st percentileScored 2026-11-07
Fix Partial Kernel (Linux): 6.5Red Hat: 3 advisoriesRed Hat: 10 fixed, 1 without a fix

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxKernel6.4 to before 6.56.5Patch availableCNA
  • Kernel VendorLinux Affected 6.4 to before 6.5 Fixed in 6.5 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*5.9 to before 5.10.190; 5.11 to before 5.15.124; 5.16 to before 6.1.43; 6.2 to before 6.4.8VulnerableLinux
cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*12.0VulnerableDebian
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.9 to before 5.10.190; 5.11 to before 5.15.124; 5.16 to before 6.1.43; 6.2 to before 6.4.8 Vulnerable ·Linux
  • cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:* Versions 12.0 Vulnerable ·Debian

Remediation

  • Fix · CNA Kernel (Linux) Fixed in 6.5

Red Hat 3 advisories

  • RHSA-2024:0461 Released 2024-01-25 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-362.18.1.el9_3, libperf-5.14.0-362.18.1.el9_3
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-362.18.1.el9_3, kernel-64k-debug-devel-matched-5.14.0-362.18.1.el9_3, kernel-64k-devel-5.14.0-362.18.1.el9_3 +11
    • Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.2.0-362.18.1.el9_3, kernel-5.14.0-362.18.1.el9_3, kernel-64k-5.14.0-362.18.1.el9_3 +29
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-362.18.1.el9_3, kernel-rt-core-5.14.0-362.18.1.el9_3, kernel-rt-debug-5.14.0-362.18.1.el9_3 +9
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-362.18.1.el9_3, kernel-rt-core-5.14.0-362.18.1.el9_3, kernel-rt-debug-5.14.0-362.18.1.el9_3 +11
  • RHSA-2024:0448 Released 2024-01-25 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-tools-libs-devel-5.14.0-284.48.1.el9_2
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-64k-debug-devel-5.14.0-284.48.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.48.1.el9_2, kernel-64k-devel-5.14.0-284.48.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool-7.0.0-284.48.1.el9_2, kernel-5.14.0-284.48.1.el9_2, kernel-64k-5.14.0-284.48.1.el9_2 +29
  • RHSA-2024:0439 Released 2024-01-25 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt-5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-core-5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-debug-5.14.0-284.48.1.rt14.333.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt-5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-core-5.14.0-284.48.1.rt14.333.el9_2, kernel-rt-debug-5.14.0-284.48.1.rt14.333.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 9AffectedNo fix yet
Red Hat CodeReady Linux Builder (v. 9)Fixed RHSA-2024:0461
Red Hat CodeReady Linux Builder EUS (v.9.2)Fixed RHSA-2024:0448
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2024:0461
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2024:0448
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2024:0461
Red Hat Enterprise Linux BaseOS EUS (v.9.2)Fixed RHSA-2024:0448
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2024:0461
Red Hat Enterprise Linux Real Time EUS (v.9.2)Fixed RHSA-2024:0439
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2024:0461
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2)Fixed RHSA-2024:0439
Not affected: 4 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux AppStream EUS (v.9.2)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-4015
  2. 2026-10-03 Alias added: GHSA-5m5v-w78j-286f
  3. 2026-10-16 Affected versions changed · Red Hat

References

Patch 2

Advisory 1

  • 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