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TI-2023-01718 Aliases CVE-2023-1829GHSA-4x82-r4q4-7g8x

Use-after-free in tcindex (traffic control index filter) in the Linux Kernel

Priority LOW 38CWE-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: 19 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 traffic control index filter (tcindex) can be exploited to achieve local privilege escalation. The tcindex_delete function which does not properly deactivate filters in case of a perfect hashes while deleting the underlying structure which can later lead to double freeing the structure. A local attacker user can use this vulnerability to elevate its privileges to root. We recommend upgrading past commit 8c710f75256bb3cf05ac7b1672c82b92c43f3d28 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ .

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01056 64th percentileScored 2026-11-07
Fix Partial Linux Kernel (Linux): 4.14.308, 4.19.276, 5.4.235 +5Red Hat: 13 advisoriesRed Hat: 19 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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
LinuxLinux Kernel3.8.0 to before 4.14.308; 4.15.0 to before 4.19.276; 4.20.0 to before 5.4.235; 5.5.0 to before 5.10.173; 5.11.0 to before 5.15.100; 5.16.0 to before 6.1.18; 6.2.0 to before 6.2.54.14.308, 4.19.276, 5.4.235, 5.10.173, 5.15.100, 6.1.18, 6.2.5, 6.3.0Patch availableCNA
  • Linux Kernel VendorLinux Affected 3.8.0 to before 4.14.308; 4.15.0 to before 4.19.276; 4.20.0 to before 5.4.235; 5.5.0 to before 5.10.173; 5.11.0 to before 5.15.100; 5.16.0 to before 6.1.18; 6.2.0 to before 6.2.5 Fixed in 4.14.308, 4.19.276, 5.4.235, 5.10.173, 5.15.100, 6.1.18, 6.2.5, 6.3.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 4.14.308; 4.15 to before 4.19.276; 4.20 to before 5.4.235; 5.5 to before 5.10.173; 5.11 to before 5.15.100; 5.16 to before 6.1.18; 6.2 to before 6.2.5VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 4.14.308; 4.15 to before 4.19.276; 4.20 to before 5.4.235; 5.5 to before 5.10.173; 5.11 to before 5.15.100; 5.16 to before 6.1.18; 6.2 to before 6.2.5 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux Kernel (Linux) Fixed in 4.14.308, 4.19.276, 5.4.235, 5.10.173, 5.15.100, 6.1.18, 6.2.5, 6.3.0

Red Hat 13 advisories

  • RHSA-2023:7434 Released 2023-11-21 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) bpftool-4.18.0-193.119.1.el8_2, kernel-4.18.0-193.119.1.el8_2, kernel-abi-whitelists-4.18.0-193.119.1.el8_2 +14
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.2) bpftool-4.18.0-193.119.1.el8_2, kernel-4.18.0-193.119.1.el8_2, kernel-abi-whitelists-4.18.0-193.119.1.el8_2 +14
    • Red Hat Enterprise Linux BaseOS TUS (v. 8.2) bpftool-4.18.0-193.119.1.el8_2, kernel-4.18.0-193.119.1.el8_2, kernel-abi-whitelists-4.18.0-193.119.1.el8_2 +14
  • RHSA-2023:7431 Released 2023-11-21 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time TUS (v. 8.2) kernel-rt-4.18.0-193.119.1.rt13.170.el8_2, kernel-rt-core-4.18.0-193.119.1.rt13.170.el8_2, kernel-rt-debug-4.18.0-193.119.1.rt13.170.el8_2 +7
    • Red Hat Enterprise Linux Real Time for NFV TUS (v. 8.2) kernel-rt-4.18.0-193.119.1.rt13.170.el8_2, kernel-rt-core-4.18.0-193.119.1.rt13.170.el8_2, kernel-rt-debug-4.18.0-193.119.1.rt13.170.el8_2 +9
  • RHSA-2023:7417 Released 2023-11-21 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.2) kpatch-patch-4_18_0-193_109_1-1-3.el8_2, kpatch-patch-4_18_0-193_113_1-1-2.el8_2, kpatch-patch-4_18_0-193_116_1-1-1.el8_2
Show 10 more Red Hat advisories
  • RHSA-2023:4962 Released 2023-09-05 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.103.1.el8_4, kernel-4.18.0-305.103.1.el8_4, kernel-abi-stablelists-4.18.0-305.103.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS E4S (v.8.4) bpftool-4.18.0-305.103.1.el8_4, kernel-4.18.0-305.103.1.el8_4, kernel-abi-stablelists-4.18.0-305.103.1.el8_4 +19
    • Red Hat Enterprise Linux BaseOS TUS (v.8.4) bpftool-4.18.0-305.103.1.el8_4, kernel-4.18.0-305.103.1.el8_4, kernel-abi-stablelists-4.18.0-305.103.1.el8_4 +14
  • RHSA-2023:4967 Released 2023-09-05 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.4) kpatch-patch-4_18_0-305_76_1-1-5.el8_4, kpatch-patch-4_18_0-305_82_1-1-4.el8_4, kpatch-patch-4_18_0-305_86_2-1-3.el8_4 +3
  • RHSA-2023:4961 Released 2023-09-05 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux NFV E4S (v.8.4) kernel-rt-4.18.0-305.103.1.rt7.178.el8_4, kernel-rt-core-4.18.0-305.103.1.rt7.178.el8_4, kernel-rt-debug-4.18.0-305.103.1.rt7.178.el8_4 +9
    • Red Hat Enterprise Linux NFV TUS (v.8.4) kernel-rt-4.18.0-305.103.1.rt7.178.el8_4, kernel-rt-core-4.18.0-305.103.1.rt7.178.el8_4, kernel-rt-debug-4.18.0-305.103.1.rt7.178.el8_4 +9
    • Red Hat Enterprise Linux RT TUS (v.8.4) kernel-rt-4.18.0-305.103.1.rt7.178.el8_4, kernel-rt-core-4.18.0-305.103.1.rt7.178.el8_4, kernel-rt-debug-4.18.0-305.103.1.rt7.178.el8_4 +7
  • RHSA-2023:4888 Released 2023-08-30 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v.8.6) kpatch-patch-4_18_0-372_41_1-1-7.el8_6, kpatch-patch-4_18_0-372_46_1-1-5.el8_6, kpatch-patch-4_18_0-372_51_1-1-4.el8_6 +3
  • RHSA-2023:4789 Released 2023-08-29 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v.8.6) kernel-tools-libs-devel-4.18.0-372.70.1.el8_6
    • Red Hat Enterprise Linux BaseOS EUS (v.8.6) bpftool-4.18.0-372.70.1.el8_6, kernel-4.18.0-372.70.1.el8_6, kernel-abi-stablelists-4.18.0-372.70.1.el8_6 +19
    • Red Hat Virtualization 4 Hypervisor for RHEL 8 kernel-devel-4.18.0-372.70.1.el8_6, perf-4.18.0-372.70.1.el8_6
  • RHSA-2023:4517 Released 2023-08-08 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-477.21.1.el8_8, kernel-4.18.0-477.21.1.el8_8, kernel-abi-stablelists-4.18.0-477.21.1.el8_8 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-477.21.1.el8_8
  • RHSA-2023:4531 Released 2023-08-08 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS (v. 8) kpatch-patch-4_18_0-477_10_1-1-2.el8_8, kpatch-patch-4_18_0-477_13_1-1-1.el8_8, kpatch-patch-4_18_0-477_15_1-1-1.el8_8
  • RHSA-2023:4541 Released 2023-08-08 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-477.21.1.rt7.284.el8_8, kernel-rt-core-4.18.0-477.21.1.rt7.284.el8_8, kernel-rt-debug-4.18.0-477.21.1.rt7.284.el8_8 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-477.21.1.rt7.284.el8_8, kernel-rt-core-4.18.0-477.21.1.rt7.284.el8_8, kernel-rt-debug-4.18.0-477.21.1.rt7.284.el8_8 +7
  • RHSA-2023:4515 Released 2023-08-08 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.1) bpftool-4.18.0-147.87.1.el8_1, kernel-4.18.0-147.87.1.el8_1, kernel-abi-whitelists-4.18.0-147.87.1.el8_1 +14
  • RHSA-2023:4516 Released 2023-08-08 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.1) kpatch-patch-4_18_0-147_78_1-1-6.el8_1, kpatch-patch-4_18_0-147_80_1-1-5.el8_1, kpatch-patch-4_18_0-147_81_1-1-4.el8_1 +2

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix planned: Will not fix
Red Hat CodeReady Linux Builder EUS (v.8.6)Fixed RHSA-2023:4789
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2023:4517, RHSA-2023:4531
Red Hat Enterprise Linux BaseOS AUS (v. 8.2)Fixed RHSA-2023:7434
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2023:4962
Red Hat Enterprise Linux BaseOS E4S (v. 8.1)Fixed RHSA-2023:4515, RHSA-2023:4516
Red Hat Enterprise Linux BaseOS E4S (v. 8.2)Fixed RHSA-2023:7417, RHSA-2023:7434
Red Hat Enterprise Linux BaseOS E4S (v.8.4)Fixed RHSA-2023:4962, RHSA-2023:4967
Red Hat Enterprise Linux BaseOS EUS (v.8.6)Fixed RHSA-2023:4789, RHSA-2023:4888
Red Hat Enterprise Linux BaseOS TUS (v. 8.2)Fixed RHSA-2023:7434
Red Hat Enterprise Linux BaseOS TUS (v.8.4)Fixed RHSA-2023:4962
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2023:4517
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2023:4541
Red Hat Enterprise Linux NFV E4S (v.8.4)Fixed RHSA-2023:4961
Red Hat Enterprise Linux NFV TUS (v.8.4)Fixed RHSA-2023:4961
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2023:4541
Red Hat Enterprise Linux RT TUS (v.8.4)Fixed RHSA-2023:4961
Red Hat Enterprise Linux Real Time TUS (v. 8.2)Fixed RHSA-2023:7431
Red Hat Enterprise Linux Real Time for NFV TUS (v. 8.2)Fixed RHSA-2023:7431
Red Hat Virtualization 4 Hypervisor for RHEL 8Fixed RHSA-2023:4789
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-1829
  2. 2026-10-03 Alias added: GHSA-4x82-r4q4-7g8x

References

Patch 2

Advisory 3

  • 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