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TI-2023-01209 Aliases CVE-2023-1281GHSA-r66m-27p7-w8fm

UAF in Linux kernel's tcindex (traffic control index filter) implementation

Priority LOW 36CWE-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

Use After Free vulnerability in Linux kernel traffic control index filter (tcindex) allows Privilege Escalation. The imperfect hash area can be updated while packets are traversing, which will cause a use-after-free when 'tcf_exts_exec()' is called with the destroyed tcf_ext. A local attacker user can use this vulnerability to elevate its privileges to root. This issue affects Linux Kernel: from 4.14 before git commit ee059170b1f7e94e55fa6cadee544e176a6e59c2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00304 23rd percentileScored 2026-11-07
Fix Partial Linux Kernel (Linux): 5.10.169, 5.15.95, 6.1.13 +1Red 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 Kernel4.14.0 to before 5.10.169; 5.11.0 to before 5.15.95; 5.16.0 to before 6.1.135.10.169, 5.15.95, 6.1.13, 6.2.0Patch availableCNA
  • Linux Kernel VendorLinux Affected 4.14.0 to before 5.10.169; 5.11.0 to before 5.15.95; 5.16.0 to before 6.1.13 Fixed in 5.10.169, 5.15.95, 6.1.13, 6.2.0 Patch available CNA

CPE configurations NVD · 9

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*4.14 to before 5.10.169; 5.11 to before 5.15.95; 5.16 to before 6.1.13VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*6.2 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:*6.2 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:*6.2 rc3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.2:rc4:*:*:*:*:*:*6.2 rc4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.2:rc5:*:*:*:*:*:*6.2 rc5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.2:rc6:*:*:*:*:*:*6.2 rc6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.2:rc7:*:*:*:*:*:*6.2 rc7VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.2:rc8:*:*:*:*:*:*6.2 rc8VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.14 to before 5.10.169; 5.11 to before 5.15.95; 5.16 to before 6.1.13 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:* Versions 6.2 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:* Versions 6.2 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:* Versions 6.2 rc3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.2:rc4:*:*:*:*:*:* Versions 6.2 rc4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.2:rc5:*:*:*:*:*:* Versions 6.2 rc5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.2:rc6:*:*:*:*:*:* Versions 6.2 rc6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.2:rc7:*:*:*:*:*:* Versions 6.2 rc7 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.2:rc8:*:*:*:*:*:* Versions 6.2 rc8 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux Kernel (Linux) Fixed in 5.10.169, 5.15.95, 6.1.13, 6.2.0

Red Hat 13 advisories

  • 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
Show 10 more Red Hat advisories
  • RHSA-2023:4256 Released 2023-07-25 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.97.1.el8_4, kernel-4.18.0-305.97.1.el8_4, kernel-abi-stablelists-4.18.0-305.97.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS E4S (v.8.4) bpftool-4.18.0-305.97.1.el8_4, kernel-4.18.0-305.97.1.el8_4, kernel-abi-stablelists-4.18.0-305.97.1.el8_4 +19
    • Red Hat Enterprise Linux BaseOS TUS (v.8.4) bpftool-4.18.0-305.97.1.el8_4, kernel-4.18.0-305.97.1.el8_4, kernel-abi-stablelists-4.18.0-305.97.1.el8_4 +14
  • RHSA-2023:4255 Released 2023-07-25 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux NFV E4S (v.8.4) kernel-rt-4.18.0-305.97.1.rt7.172.el8_4, kernel-rt-core-4.18.0-305.97.1.rt7.172.el8_4, kernel-rt-debug-4.18.0-305.97.1.rt7.172.el8_4 +9
    • Red Hat Enterprise Linux NFV TUS (v.8.4) kernel-rt-4.18.0-305.97.1.rt7.172.el8_4, kernel-rt-core-4.18.0-305.97.1.rt7.172.el8_4, kernel-rt-debug-4.18.0-305.97.1.rt7.172.el8_4 +9
    • Red Hat Enterprise Linux RT TUS (v.8.4) kernel-rt-4.18.0-305.97.1.rt7.172.el8_4, kernel-rt-core-4.18.0-305.97.1.rt7.172.el8_4, kernel-rt-debug-4.18.0-305.97.1.rt7.172.el8_4 +7
  • RHSA-2023:4262 Released 2023-07-25 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.4) kpatch-patch-4_18_0-305_76_1-1-4.el8_4, kpatch-patch-4_18_0-305_82_1-1-3.el8_4, kpatch-patch-4_18_0-305_86_2-1-2.el8_4 +2
  • RHSA-2023:4146 Released 2023-07-18 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.2) kpatch-patch-4_18_0-193_100_1-1-2.el8_2, kpatch-patch-4_18_0-193_105_1-1-1.el8_2, kpatch-patch-4_18_0-193_95_1-1-4.el8_2 +1
  • RHSA-2023:4130 Released 2023-07-18 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder EUS (v.8.6) kernel-tools-libs-devel-4.18.0-372.64.1.el8_6
    • Red Hat Enterprise Linux BaseOS EUS (v.8.6) bpftool-4.18.0-372.64.1.el8_6, kernel-4.18.0-372.64.1.el8_6, kernel-abi-stablelists-4.18.0-372.64.1.el8_6 +19
    • Red Hat Virtualization 4 Hypervisor for RHEL 8 kernel-devel-4.18.0-372.64.1.el8_6, perf-4.18.0-372.64.1.el8_6
  • RHSA-2023:4145 Released 2023-07-18 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v.8.6) kpatch-patch-4_18_0-372_40_1-1-7.el8_6, kpatch-patch-4_18_0-372_41_1-1-6.el8_6, kpatch-patch-4_18_0-372_46_1-1-4.el8_6 +3
  • RHSA-2023:4125 Released 2023-07-18 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) bpftool-4.18.0-193.109.1.el8_2, kernel-4.18.0-193.109.1.el8_2, kernel-abi-whitelists-4.18.0-193.109.1.el8_2 +14
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.2) bpftool-4.18.0-193.109.1.el8_2, kernel-4.18.0-193.109.1.el8_2, kernel-abi-whitelists-4.18.0-193.109.1.el8_2 +14
    • Red Hat Enterprise Linux BaseOS TUS (v. 8.2) bpftool-4.18.0-193.109.1.el8_2, kernel-4.18.0-193.109.1.el8_2, kernel-abi-whitelists-4.18.0-193.109.1.el8_2 +14
  • RHSA-2023:4126 Released 2023-07-18 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Real Time TUS (v. 8.2) kernel-rt-4.18.0-193.109.1.rt13.160.el8_2, kernel-rt-core-4.18.0-193.109.1.rt13.160.el8_2, kernel-rt-debug-4.18.0-193.109.1.rt13.160.el8_2 +7
    • Red Hat Enterprise Linux Real Time for NFV TUS (v. 8.2) kernel-rt-4.18.0-193.109.1.rt13.160.el8_2, kernel-rt-core-4.18.0-193.109.1.rt13.160.el8_2, kernel-rt-debug-4.18.0-193.109.1.rt13.160.el8_2 +9
  • RHSA-2023:3853 Released 2023-06-27 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.1) kpatch-patch-4_18_0-147_77_1-1-6.el8_1, kpatch-patch-4_18_0-147_78_1-1-5.el8_1, kpatch-patch-4_18_0-147_80_1-1-4.el8_1 +2
  • RHSA-2023:3852 Released 2023-06-27 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.1) bpftool-4.18.0-147.85.1.el8_1, kernel-4.18.0-147.85.1.el8_1, kernel-abi-whitelists-4.18.0-147.85.1.el8_1 +14

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-2023:4130
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-2023:4125
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2023:4256
Red Hat Enterprise Linux BaseOS E4S (v. 8.1)Fixed RHSA-2023:3852, RHSA-2023:3853
Red Hat Enterprise Linux BaseOS E4S (v. 8.2)Fixed RHSA-2023:4125, RHSA-2023:4146
Red Hat Enterprise Linux BaseOS E4S (v.8.4)Fixed RHSA-2023:4256, RHSA-2023:4262
Red Hat Enterprise Linux BaseOS EUS (v.8.6)Fixed RHSA-2023:4130, RHSA-2023:4145
Red Hat Enterprise Linux BaseOS TUS (v. 8.2)Fixed RHSA-2023:4125
Red Hat Enterprise Linux BaseOS TUS (v.8.4)Fixed RHSA-2023:4256
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-2023:4255
Red Hat Enterprise Linux NFV TUS (v.8.4)Fixed RHSA-2023:4255
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2023:4541
Red Hat Enterprise Linux RT TUS (v.8.4)Fixed RHSA-2023:4255
Red Hat Enterprise Linux Real Time TUS (v. 8.2)Fixed RHSA-2023:4126
Red Hat Enterprise Linux Real Time for NFV TUS (v. 8.2)Fixed RHSA-2023:4126
Red Hat Virtualization 4 Hypervisor for RHEL 8Fixed RHSA-2023:4130
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-1281
  2. 2026-10-03 Alias added: GHSA-r66m-27p7-w8fm

References

Patch 2

Advisory 3

Other 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