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TI-2023-01037 Aliases CVE-2023-1095GHSA-grc4-c844-m2mx

NULL pointer dereference in Linux kernel netfilter subsystem.

Priority LOW 24CWE-476Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 16 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

In nf_tables_updtable, if nf_tables_table_enable returns an error, nft_trans_destroy is called to free the transaction object. nft_trans_destroy() calls list_del(), but the transaction was never placed on a list -- the list head is all zeroes, this results in a NULL pointer dereference.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00245 15th percentileScored 2026-11-07
Fix Partial Red Hat: 7 advisoriesRed Hat: 16 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
—Linux kernel netfilter subsystem.Fixed in 6.0-rc1—No fix listedCNA
  • Linux kernel netfilter subsystem. Vendor— Affected Fixed in 6.0-rc1 Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 6.0VulnerableLinux
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*8.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*9.0VulnerableRed Hat
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 6.0 Vulnerable ·Linux
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat

Remediation

Red Hat 7 advisories

  • RHSA-2023:6813 Released 2023-11-08 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.1) bpftool-4.18.0-147.94.1.el8_1, kernel-4.18.0-147.94.1.el8_1, kernel-abi-whitelists-4.18.0-147.94.1.el8_1 +14
  • RHSA-2023:5627 Released 2023-10-10 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v.8.6) kernel-tools-libs-devel-4.18.0-372.75.1.el8_6
    • Red Hat Enterprise Linux BaseOS EUS (v.8.6) bpftool-4.18.0-372.75.1.el8_6, kernel-4.18.0-372.75.1.el8_6, kernel-abi-stablelists-4.18.0-372.75.1.el8_6 +19
    • Red Hat Virtualization 4 Hypervisor for RHEL 8 kernel-devel-4.18.0-372.75.1.el8_6, perf-4.18.0-372.75.1.el8_6
  • RHSA-2023:5628 Released 2023-10-10 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.108.1.el8_4, kernel-4.18.0-305.108.1.el8_4, kernel-abi-stablelists-4.18.0-305.108.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS E4S (v.8.4) bpftool-4.18.0-305.108.1.el8_4, kernel-4.18.0-305.108.1.el8_4, kernel-abi-stablelists-4.18.0-305.108.1.el8_4 +19
    • Red Hat Enterprise Linux BaseOS TUS (v.8.4) bpftool-4.18.0-305.108.1.el8_4, kernel-4.18.0-305.108.1.el8_4, kernel-abi-stablelists-4.18.0-305.108.1.el8_4 +14
Show 4 more Red Hat advisories
  • RHSA-2023:2951 Released 2023-05-16 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-477.10.1.el8_8, kernel-4.18.0-477.10.1.el8_8, kernel-abi-stablelists-4.18.0-477.10.1.el8_8 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-477.10.1.el8_8
  • RHSA-2023:2736 Released 2023-05-16 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-core-4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-debug-4.18.0-477.10.1.rt7.274.el8_8 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-core-4.18.0-477.10.1.rt7.274.el8_8, kernel-rt-debug-4.18.0-477.10.1.rt7.274.el8_8 +7
  • RHSA-2022:8267 Released 2022-11-15 · Red Hat rating Moderate
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-162.6.1.el9_1
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-debug-devel-5.14.0-162.6.1.el9_1, kernel-debug-devel-matched-5.14.0-162.6.1.el9_1, kernel-devel-5.14.0-162.6.1.el9_1 +5
    • Red Hat Enterprise Linux BaseOS (v. 9) bpftool-5.14.0-162.6.1.el9_1, kernel-5.14.0-162.6.1.el9_1, kernel-abi-stablelists-5.14.0-162.6.1.el9_1 +14
  • RHSA-2022:7933 Released 2022-11-15 · Red Hat rating Moderate
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-core-5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-debug-5.14.0-162.6.1.rt21.168.el9_1 +7
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-core-5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-debug-5.14.0-162.6.1.rt21.168.el9_1 +9

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 CodeReady Linux Builder (v. 9)Fixed RHSA-2022:8267
Red Hat CodeReady Linux Builder EUS (v.8.6)Fixed RHSA-2023:5627
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2022:8267
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2023:2951
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2022:8267
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2023:5628
Red Hat Enterprise Linux BaseOS E4S (v. 8.1)Fixed RHSA-2023:6813
Red Hat Enterprise Linux BaseOS E4S (v.8.4)Fixed RHSA-2023:5628
Red Hat Enterprise Linux BaseOS EUS (v.8.6)Fixed RHSA-2023:5627
Red Hat Enterprise Linux BaseOS TUS (v.8.4)Fixed RHSA-2023:5628
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2023:2951
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2023:2736
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2023:2736
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2022:7933
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2022:7933
Red Hat Virtualization 4 Hypervisor for RHEL 8Fixed RHSA-2023:5627

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-1095
  2. 2026-10-03 Alias added: GHSA-grc4-c844-m2mx

References

Patch 2

Sources

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