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TI-2023-03836 Aliases CVE-2023-4147GHSA-pcv9-72q8-27vc

Kernel: netfilter: nf_tables_newrule when adding a rule with nfta_rule_chain_id leads to use-after-free

Priority HIGH 69CWE-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
Fixed

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 flaw was found in the Linux kernel’s Netfilter functionality when adding a rule with NFTA_RULE_CHAIN_ID. This flaw allows a local user to crash or escalate their privileges on the system.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00553 46th percentileScored 2026-11-07
Fix Fixed Red Hat: 6 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Red HatRed Hat Enterprise Linux 9—5.14.0-284.30.1.el9_2Patch availableCNA
Red HatRed Hat Enterprise Linux 9—5.14.0-284.30.1.rt14.315.el9_2Patch availableCNA
Red HatRed Hat Enterprise Linux 9—5.14.0-284.30.1.el9_2Patch availableCNA
Red HatRed Hat Enterprise Linux 9——Not affectedCNA
Red HatRed Hat Enterprise Linux 9.0 Extended Update Support—5.14.0-70.80.1.el9_0Patch availableCNA
Red HatRed Hat Enterprise Linux 9.0 Extended Update Support—5.14.0-70.80.1.rt21.151.el9_0Patch availableCNA
Red HatRed Hat Enterprise Linux 9.0 Extended Update Support——Not affectedCNA
Red HatRed Hat Enterprise Linux 6——Not affectedCNA
Red HatRed Hat Enterprise Linux 7——Not affectedCNA
Red HatRed Hat Enterprise Linux 7——Not affectedCNA
Red HatRed Hat Enterprise Linux 8——Not affectedCNA
Red HatRed Hat Enterprise Linux 8——Not affectedCNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 5.14.0-284.30.1.el9_2 Patch available CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 5.14.0-284.30.1.rt14.315.el9_2 Patch available CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 5.14.0-284.30.1.el9_2 Patch available CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Enterprise Linux 9.0 Extended Update Support VendorRed Hat Affected — Fixed in 5.14.0-70.80.1.el9_0 Patch available CNA
  • Red Hat Enterprise Linux 9.0 Extended Update Support VendorRed Hat Affected — Fixed in 5.14.0-70.80.1.rt21.151.el9_0 Patch available CNA
  • Red Hat Enterprise Linux 9.0 Extended Update Support VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — Not affected CNA

CPE configurations NVD · 13

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:linux:linux_kernel:6.5:rc1:*:*:*:*:*:*6.5 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:*6.5 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:*6.5 rc3VulnerableLinux
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*38VulnerableFedoraproject
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*9.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_eus:9.2:*:*:*:*:*:*:*9.2VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_for_real_time:9.0:*:*:*:*:*:*:*9.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_for_real_time_for_nfv:9.0:*:*:*:*:*:*:*9.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:9.2:*:*:*:*:*:*:*9.2VulnerableRed Hat
  • 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:linux:linux_kernel:6.5:rc1:*:*:*:*:*:* Versions 6.5 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:* Versions 6.5 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:* Versions 6.5 rc3 Vulnerable ·Linux
  • cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* Versions 38 Vulnerable ·Fedoraproject
  • cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_eus:9.2:*:*:*:*:*:*:* Versions 9.2 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_for_real_time:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_for_real_time_for_nfv:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:9.2:*:*:*:*:*:*:* Versions 9.2 Vulnerable ·Red Hat
Show 3 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*12.0VulnerableDebian
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:* Versions 12.0 Vulnerable ·Debian

Remediation

Red Hat 6 advisories

  • RHSA-2023:7411 Released 2023-11-21 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v.9.0) kpatch-patch-5_14_0-70_53_1-1-5.el9_0, kpatch-patch-5_14_0-70_58_1-1-4.el9_0, kpatch-patch-5_14_0-70_64_1-1-3.el9_0 +2
  • RHSA-2023:7382 Released 2023-11-21 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder EUS (v.9.0) kernel-tools-libs-devel-5.14.0-70.80.1.el9_0
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) kernel-debug-devel-5.14.0-70.80.1.el9_0, kernel-debug-devel-matched-5.14.0-70.80.1.el9_0, kernel-devel-5.14.0-70.80.1.el9_0 +5
    • Red Hat Enterprise Linux BaseOS EUS (v.9.0) bpftool-5.14.0-70.80.1.el9_0, kernel-5.14.0-70.80.1.el9_0, kernel-abi-stablelists-5.14.0-70.80.1.el9_0 +14
  • RHSA-2023:7389 Released 2023-11-21 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time EUS (v.9.0) kernel-rt-5.14.0-70.80.1.rt21.151.el9_0, kernel-rt-core-5.14.0-70.80.1.rt21.151.el9_0, kernel-rt-debug-5.14.0-70.80.1.rt21.151.el9_0 +7
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0) kernel-rt-5.14.0-70.80.1.rt21.151.el9_0, kernel-rt-core-5.14.0-70.80.1.rt21.151.el9_0, kernel-rt-debug-5.14.0-70.80.1.rt21.151.el9_0 +9
Show 3 more Red Hat advisories
  • RHSA-2023:5069 Released 2023-09-12 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-284.30.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.30.1.el9_2, kernel-64k-devel-5.14.0-284.30.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.0.0-284.30.1.el9_2, kernel-5.14.0-284.30.1.el9_2, kernel-64k-5.14.0-284.30.1.el9_2 +29
    • Red Hat Enterprise Linux CRB (v. 9) kernel-tools-libs-devel-5.14.0-284.30.1.el9_2
  • RHSA-2023:5093 Released 2023-09-12 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS (v. 9) kpatch-patch-5_14_0-284_11_1-1-5.el9_2, kpatch-patch-5_14_0-284_18_1-1-4.el9_2, kpatch-patch-5_14_0-284_25_1-1-3.el9_2
  • RHSA-2023:5091 Released 2023-09-12 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux NFV (v. 9) kernel-rt-5.14.0-284.30.1.rt14.315.el9_2, kernel-rt-core-5.14.0-284.30.1.rt14.315.el9_2, kernel-rt-debug-5.14.0-284.30.1.rt14.315.el9_2 +11
    • Red Hat Enterprise Linux RT (v. 9) kernel-rt-5.14.0-284.30.1.rt14.315.el9_2, kernel-rt-core-5.14.0-284.30.1.rt14.315.el9_2, kernel-rt-debug-5.14.0-284.30.1.rt14.315.el9_2 +9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat CodeReady Linux Builder EUS (v.9.0)Fixed RHSA-2023:7382
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:5069
Red Hat Enterprise Linux AppStream EUS (v.9.0)Fixed RHSA-2023:7382
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2023:5069, RHSA-2023:5093
Red Hat Enterprise Linux BaseOS EUS (v.9.0)Fixed RHSA-2023:7382, RHSA-2023:7411
Red Hat Enterprise Linux CRB (v. 9)Fixed RHSA-2023:5069
Red Hat Enterprise Linux NFV (v. 9)Fixed RHSA-2023:5091
Red Hat Enterprise Linux RT (v. 9)Fixed RHSA-2023:5091
Red Hat Enterprise Linux Real Time EUS (v.9.0)Fixed RHSA-2023:7389
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)Fixed RHSA-2023:7389
Not affected: 4 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux AppStream (v. 9)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-4147
  2. 2026-10-03 Alias added: GHSA-pcv9-72q8-27vc

References

Patch 4

Advisory 6

  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-10530 Code injection in [UNKNOWN] RichFaces KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-23530 Sudo before 1.9.17p1 allows local users to obtain root access because /etc/nsswitch.conf… KEVCVSS 3.1CRITICAL 9.3
  • TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
See all 1955 →

Sources

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