Read the docs
TI-2018-13124 Aliases CVE-2018-18559GHSA-8w88-57v8-p48h

In the Linux kernel through 4.19, a use-after-free can occur due to a race condition…

Priority MEDIUM 40CWE-362Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

In the Linux kernel through 4.19, a use-after-free can occur due to a race condition between fanout_add from setsockopt and bind on an AF_PACKET socket. This issue exists because of the 15fe076edea787807a7cdc168df832544b58eba6 incomplete fix for a race condition. The code mishandles a certain multithreaded case involving a packet_do_bind unregister action followed by a packet_notifier register action. Later, packet_release operates on only one of the two applicable linked lists. The attacker can achieve Program Counter control.

Why it matters now

EPSS 0.02612 85th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 7 advisories

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 9

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*3.2.95 to before 3.2.100; 3.14.58 to before 3.15; 3.18.25 to before 3.18.88; 4.1.14 to before 4.1.49; 4.2.7 to before 4.3; 4.3.1 to before 4.4.106; 4.5 to before 4.9.70; 4.10 to before 4.14.7VulnerableLinux
cpe:2.3:a:redhat:openshift_container_platform:3.11:*:*:*:*:*:*:*3.11VulnerableRed Hat
cpe:2.3:a:redhat:virtualization_host:4.0:*:*:*:*:*:*:*4.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 3.2.95 to before 3.2.100; 3.14.58 to before 3.15; 3.18.25 to before 3.18.88; 4.1.14 to before 4.1.49; 4.2.7 to before 4.3; 4.3.1 to before 4.4.106; 4.5 to before 4.9.70; 4.10 to before 4.14.7 Vulnerable ·Linux
  • cpe:2.3:a:redhat:openshift_container_platform:3.11:*:*:*:*:*:*:* Versions 3.11 Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:virtualization_host:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat

Remediation

Red Hat 7 advisories

  • RHSA-2020:0174 Released 2020-01-21 · Red Hat rating Important
    kernel-alt security and bug fix update
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) kernel-4.14.0-115.17.1.el7a, kernel-abi-whitelists-4.14.0-115.17.1.el7a, kernel-alt-4.14.0-115.17.1.el7a +8
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) kernel-debug-devel-4.14.0-115.17.1.el7a, kernel-tools-libs-devel-4.14.0-115.17.1.el7a
  • RHSA-2019:4159 Released 2019-12-10 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Server AUS (v. 7.3) kernel-3.10.0-514.71.1.el7, kernel-abi-whitelists-3.10.0-514.71.1.el7, kernel-debug-3.10.0-514.71.1.el7 +8
    • Red Hat Enterprise Linux Server E4S (v. 7.3) kernel-3.10.0-514.71.1.el7, kernel-abi-whitelists-3.10.0-514.71.1.el7, kernel-bootwrapper-3.10.0-514.71.1.el7 +9
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.3) kernel-tools-libs-devel-3.10.0-514.71.1.el7
    • Red Hat Enterprise Linux Server Optional E4S (v. 7.3) kernel-debug-devel-3.10.0-514.71.1.el7, kernel-tools-libs-devel-3.10.0-514.71.1.el7
    • Red Hat Enterprise Linux Server Optional TUS (v. 7.3) kernel-tools-libs-devel-3.10.0-514.71.1.el7
    • Red Hat Enterprise Linux Server TUS (v. 7.3) kernel-3.10.0-514.71.1.el7, kernel-abi-whitelists-3.10.0-514.71.1.el7, kernel-debug-3.10.0-514.71.1.el7 +8
  • RHSA-2019:3967 Released 2019-11-26 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.5) kernel-3.10.0-862.44.2.el7, kernel-abi-whitelists-3.10.0-862.44.2.el7, kernel-debug-3.10.0-862.44.2.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5) kernel-tools-libs-devel-3.10.0-862.44.2.el7
    • Red Hat Enterprise Linux Server EUS (v. 7.5) kernel-3.10.0-862.44.2.el7, kernel-abi-whitelists-3.10.0-862.44.2.el7, kernel-bootwrapper-3.10.0-862.44.2.el7 +11
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.5) kernel-debug-devel-3.10.0-862.44.2.el7, kernel-tools-libs-devel-3.10.0-862.44.2.el7
Show 4 more Red Hat advisories
  • RHSA-2019:1190 Released 2019-05-14 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt-1:3.10.0-693.47.2.rt56.641.el6rt, kernel-rt-debug-1:3.10.0-693.47.2.rt56.641.el6rt, kernel-rt-debug-devel-1:3.10.0-693.47.2.rt56.641.el6rt +7
  • RHSA-2019:1170 Released 2019-05-14 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.4) kernel-3.10.0-693.47.2.el7, kernel-abi-whitelists-3.10.0-693.47.2.el7, kernel-debug-3.10.0-693.47.2.el7 +7
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4) kernel-tools-libs-devel-3.10.0-693.47.2.el7
    • Red Hat Enterprise Linux Server EUS (v. 7.4) kernel-3.10.0-693.47.2.el7, kernel-abi-whitelists-3.10.0-693.47.2.el7, kernel-bootwrapper-3.10.0-693.47.2.el7 +10
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.4) kernel-debug-devel-3.10.0-693.47.2.el7, kernel-tools-libs-devel-3.10.0-693.47.2.el7
  • RHSA-2019:0163 Released 2019-01-29 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) bpftool-3.10.0-957.5.1.el7, kernel-3.10.0-957.5.1.el7, kernel-abi-whitelists-3.10.0-957.5.1.el7 +9
    • Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-957.5.1.el7
    • Red Hat Enterprise Linux ComputeNode (v. 7) bpftool-3.10.0-957.5.1.el7, kernel-3.10.0-957.5.1.el7, kernel-abi-whitelists-3.10.0-957.5.1.el7 +9
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-957.5.1.el7
    • Red Hat Enterprise Linux Server (v. 7) bpftool-3.10.0-957.5.1.el7, kernel-3.10.0-957.5.1.el7, kernel-abi-whitelists-3.10.0-957.5.1.el7 +12
    • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debug-devel-3.10.0-957.5.1.el7, kernel-tools-libs-devel-3.10.0-957.5.1.el7
    • Red Hat Enterprise Linux Workstation (v. 7) bpftool-3.10.0-957.5.1.el7, kernel-3.10.0-957.5.1.el7, kernel-abi-whitelists-3.10.0-957.5.1.el7 +9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-957.5.1.el7
  • RHSA-2019:0188 Released 2019-01-29 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Realtime (v. 7) kernel-rt-3.10.0-957.5.1.rt56.916.el7, kernel-rt-debug-3.10.0-957.5.1.rt56.916.el7, kernel-rt-debug-devel-3.10.0-957.5.1.rt56.916.el7 +4
    • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt-3.10.0-957.5.1.rt56.916.el7, kernel-rt-debug-3.10.0-957.5.1.rt56.916.el7, kernel-rt-debug-devel-3.10.0-957.5.1.rt56.916.el7 +7

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2019:0163
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2019:0163
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2019:0163
Red Hat Enterprise Linux ComputeNode EUS (v. 7.4)Fixed RHSA-2019:1170
Red Hat Enterprise Linux ComputeNode EUS (v. 7.5)Fixed RHSA-2019:3967
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2019:0163
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4)Fixed RHSA-2019:1170
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5)Fixed RHSA-2019:3967
Red Hat Enterprise Linux Realtime (v. 7)Fixed RHSA-2019:0188
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2019:0163
Red Hat Enterprise Linux Server AUS (v. 7.3)Fixed RHSA-2019:4159
Red Hat Enterprise Linux Server E4S (v. 7.3)Fixed RHSA-2019:4159
Red Hat Enterprise Linux Server EUS (v. 7.4)Fixed RHSA-2019:1170
Red Hat Enterprise Linux Server EUS (v. 7.5)Fixed RHSA-2019:3967
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2019:0163
Red Hat Enterprise Linux Server Optional AUS (v. 7.3)Fixed RHSA-2019:4159
Red Hat Enterprise Linux Server Optional E4S (v. 7.3)Fixed RHSA-2019:4159
Red Hat Enterprise Linux Server Optional EUS (v. 7.4)Fixed RHSA-2019:1170
Red Hat Enterprise Linux Server Optional EUS (v. 7.5)Fixed RHSA-2019:3967
Red Hat Enterprise Linux Server Optional TUS (v. 7.3)Fixed RHSA-2019:4159
Red Hat Enterprise Linux Server TUS (v. 7.3)Fixed RHSA-2019:4159
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2019:0163
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2019:0163
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2020:0174
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)Fixed RHSA-2020:0174
Red Hat Enterprise Linux for Real Time for NFV (v. 7)Fixed RHSA-2019:0188
Red Hat MRG Realtime for RHEL 6 Server v.2Fixed RHSA-2019:1190
Not affected: 3 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-18559
  2. 2026-10-03 Alias added: GHSA-8w88-57v8-p48h

References

Exploit 1

Advisory 8

Sources

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