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TI-2018-14800 Aliases CVE-2018-20836GHSA-hjqh-c7g9-6w2x

An issue was discovered in the Linux kernel before 4.20.

Priority MEDIUM 43CWE-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
Partial Red Hat: 19 fixed, 4 without a fix

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

Summary

An issue was discovered in the Linux kernel before 4.20. There is a race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c, leading to a use-after-free.

Why it matters now

EPSS 0.05088 92nd percentileScored 2026-11-07
Fix Partial Red Hat: 4 advisoriesRed Hat: 19 fixed, 4 without a fix

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 · 17

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 3.16.72; 3.17 to before 3.18.140; 3.19 to before 4.4.180; 4.5 to before 4.9.175; 4.10 to before 4.14.118; 4.15 to before 4.19.42VulnerableLinux
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*16.04VulnerableCanonical
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:a:f5:traffix_signaling_delivery_controller:5.0.0:*:*:*:*:*:*:*5.0.0VulnerableF5
cpe:2.3:a:f5:traffix_signaling_delivery_controller:5.1.0:*:*:*:*:*:*:*5.1.0VulnerableF5
cpe:2.3:a:netapp:active_iq_unified_manager:*:*:*:*:*:vmware_vsphere:*:*9.5VulnerableNetApp
cpe:2.3:a:netapp:snapprotect:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 3.16.72; 3.17 to before 3.18.140; 3.19 to before 4.4.180; 4.5 to before 4.9.175; 4.10 to before 4.14.118; 4.15 to before 4.19.42 Vulnerable ·Linux
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:a:f5:traffix_signaling_delivery_controller:5.0.0:*:*:*:*:*:*:* Versions 5.0.0 Vulnerable ·F5
  • cpe:2.3:a:f5:traffix_signaling_delivery_controller:5.1.0:*:*:*:*:*:*:* Versions 5.1.0 Vulnerable ·F5
  • cpe:2.3:a:netapp:active_iq_unified_manager:*:*:*:*:*:vmware_vsphere:*:* Versions 9.5 Vulnerable ·NetApp
  • cpe:2.3:a:netapp:snapprotect:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
Show 7 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:netapp:solidfire_\&_hci_storage_node:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:storage_replication_adapter_for_clustered_data_ontap:-:*:*:*:*:vmware_vsphere:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:vasa_provider_for_clustered_data_ontap:*:*:*:*:*:*:*:*7.2VulnerableNetApp
cpe:2.3:a:netapp:virtual_storage_console:*:*:*:*:*:vmware_vsphere:*:*7.2VulnerableNetApp
cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*15.0VulnerableopenSUSE
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*15.1VulnerableopenSUSE
  • cpe:2.3:a:netapp:solidfire_\&_hci_storage_node:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:netapp:storage_replication_adapter_for_clustered_data_ontap:-:*:*:*:*:vmware_vsphere:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:netapp:vasa_provider_for_clustered_data_ontap:*:*:*:*:*:*:*:* Versions 7.2 Vulnerable ·NetApp
  • cpe:2.3:a:netapp:virtual_storage_console:*:*:*:*:*:vmware_vsphere:*:* Versions 7.2 Vulnerable ·NetApp
  • cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* Versions 15.0 Vulnerable ·openSUSE
  • cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE

Remediation

Red Hat 4 advisories

  • RHSA-2021:0019 Released 2021-01-05 · Red Hat rating Moderate
    kernel security and bug fix update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) bpftool-3.10.0-1062.43.1.el7, kernel-3.10.0-1062.43.1.el7, kernel-abi-whitelists-3.10.0-1062.43.1.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) kernel-tools-libs-devel-3.10.0-1062.43.1.el7
    • Red Hat Enterprise Linux Server EUS (v. 7.7) bpftool-3.10.0-1062.43.1.el7, kernel-3.10.0-1062.43.1.el7, kernel-abi-whitelists-3.10.0-1062.43.1.el7 +11
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.7) kernel-debug-devel-3.10.0-1062.43.1.el7, kernel-tools-libs-devel-3.10.0-1062.43.1.el7
  • RHSA-2020:5656 Released 2020-12-22 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) bpftool-3.10.0-957.65.1.el7, kernel-3.10.0-957.65.1.el7, kernel-abi-whitelists-3.10.0-957.65.1.el7 +9
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) kernel-tools-libs-devel-3.10.0-957.65.1.el7
    • Red Hat Enterprise Linux Server EUS (v. 7.6) bpftool-3.10.0-957.65.1.el7, kernel-3.10.0-957.65.1.el7, kernel-abi-whitelists-3.10.0-957.65.1.el7 +12
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.6) kernel-debug-devel-3.10.0-957.65.1.el7, kernel-tools-libs-devel-3.10.0-957.65.1.el7
    • Red Hat Virtualization 4.2 Hypervisor for RHEL 7.6 EUS kernel-devel-3.10.0-957.65.1.el7, kernel-headers-3.10.0-957.65.1.el7, perf-3.10.0-957.65.1.el7 +1
  • RHSA-2020:4060 Released 2020-09-29 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) bpftool-3.10.0-1160.el7, kernel-3.10.0-1160.el7, kernel-abi-whitelists-3.10.0-1160.el7 +8
    • Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.el7
    • Red Hat Enterprise Linux ComputeNode (v. 7) bpftool-3.10.0-1160.el7, kernel-3.10.0-1160.el7, kernel-abi-whitelists-3.10.0-1160.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.el7
    • Red Hat Enterprise Linux Server (v. 7) bpftool-3.10.0-1160.el7, kernel-3.10.0-1160.el7, kernel-abi-whitelists-3.10.0-1160.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debug-devel-3.10.0-1160.el7, kernel-tools-libs-devel-3.10.0-1160.el7
    • Red Hat Enterprise Linux Workstation (v. 7) bpftool-3.10.0-1160.el7, kernel-3.10.0-1160.el7, kernel-abi-whitelists-3.10.0-1160.el7 +8
    • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.el7
Show 1 more Red Hat advisories
  • RHSA-2020:4062 Released 2020-09-29 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt-3.10.0-1160.rt56.1131.el7, kernel-rt-debug-3.10.0-1160.rt56.1131.el7, kernel-rt-debug-devel-3.10.0-1160.rt56.1131.el7 +4
    • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt-3.10.0-1160.rt56.1131.el7, kernel-rt-debug-3.10.0-1160.rt56.1131.el7, kernel-rt-debug-devel-3.10.0-1160.rt56.1131.el7 +7

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 7AffectedNo fix planned: Will not fix
Red Hat Enterprise MRG 2AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2020:4060
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2020:4060
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2020:4060
Red Hat Enterprise Linux ComputeNode EUS (v. 7.6)Fixed RHSA-2020:5656
Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)Fixed RHSA-2021:0019
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2020:4060
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6)Fixed RHSA-2020:5656
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7)Fixed RHSA-2021:0019
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2020:4060
Red Hat Enterprise Linux Server EUS (v. 7.6)Fixed RHSA-2020:5656
Red Hat Enterprise Linux Server EUS (v. 7.7)Fixed RHSA-2021:0019
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2020:4060
Red Hat Enterprise Linux Server Optional EUS (v. 7.6)Fixed RHSA-2020:5656
Red Hat Enterprise Linux Server Optional EUS (v. 7.7)Fixed RHSA-2021:0019
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2020:4060
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2020:4060
Red Hat Enterprise Linux for Real Time (v. 7)Fixed RHSA-2020:4062
Red Hat Enterprise Linux for Real Time for NFV (v. 7)Fixed RHSA-2020:4062
Red Hat Virtualization 4.2 Hypervisor for RHEL 7.6 EUSFixed RHSA-2020:5656
Not affected: 3 products
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)
  • Red Hat Enterprise Linux Server EUS (v. 7.7)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-20836
  2. 2026-10-03 Alias added: GHSA-hjqh-c7g9-6w2x

References

Patch 2

Advisory 11

Sources

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