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TI-2018-05210 Aliases CVE-2018-7191GHSA-p54q-624c-fr42

In the tun subsystem in the Linux kernel before 4.13.14, dev_get_valid_name is not called…

Priority LOW 26CWE-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: 19 fixed, 3 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

In the tun subsystem in the Linux kernel before 4.13.14, dev_get_valid_name is not called before register_netdevice. This allows local users to cause a denial of service (NULL pointer dereference and panic) via an ioctl(TUNSETIFF) call with a dev name containing a / character. This is similar to CVE-2013-4343.

Why it matters now

EPSS 0.00654 51st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 4 advisoriesRed Hat: 19 fixed, 3 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 · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 4.13.14VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 4.13.14 Vulnerable ·Linux

Remediation

Red Hat 4 advisories

  • RHSA-2020:2851 Released 2020-07-07 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) bpftool-3.10.0-957.56.1.el7, kernel-3.10.0-957.56.1.el7, kernel-abi-whitelists-3.10.0-957.56.1.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) kernel-tools-libs-devel-3.10.0-957.56.1.el7
    • Red Hat Enterprise Linux Server EUS (v. 7.6) bpftool-3.10.0-957.56.1.el7, kernel-3.10.0-957.56.1.el7, kernel-abi-whitelists-3.10.0-957.56.1.el7 +11
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.6) kernel-debug-devel-3.10.0-957.56.1.el7, kernel-tools-libs-devel-3.10.0-957.56.1.el7
    • Red Hat Virtualization 4.2 Hypervisor for RHEL 7.6 EUS kernel-devel-3.10.0-957.56.1.el7, perf-3.10.0-957.56.1.el7, python-perf-3.10.0-957.56.1.el7
  • RHSA-2020:2522 Released 2020-06-11 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) bpftool-3.10.0-1062.26.1.el7, kernel-3.10.0-1062.26.1.el7, kernel-abi-whitelists-3.10.0-1062.26.1.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) kernel-tools-libs-devel-3.10.0-1062.26.1.el7
    • Red Hat Enterprise Linux Server EUS (v. 7.7) bpftool-3.10.0-1062.26.1.el7, kernel-3.10.0-1062.26.1.el7, kernel-abi-whitelists-3.10.0-1062.26.1.el7 +11
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.7) kernel-debug-devel-3.10.0-1062.26.1.el7, kernel-tools-libs-devel-3.10.0-1062.26.1.el7
  • RHSA-2020:1070 Released 2020-03-31 · Red Hat rating Moderate
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt-3.10.0-1127.rt56.1093.el7, kernel-rt-debug-3.10.0-1127.rt56.1093.el7, kernel-rt-debug-devel-3.10.0-1127.rt56.1093.el7 +4
    • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt-3.10.0-1127.rt56.1093.el7, kernel-rt-debug-3.10.0-1127.rt56.1093.el7, kernel-rt-debug-devel-3.10.0-1127.rt56.1093.el7 +7
Show 1 more Red Hat advisories
  • RHSA-2020:1016 Released 2020-03-31 · Red Hat rating Moderate
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) bpftool-3.10.0-1127.el7, kernel-3.10.0-1127.el7, kernel-abi-whitelists-3.10.0-1127.el7 +8
    • Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-1127.el7
    • Red Hat Enterprise Linux ComputeNode (v. 7) bpftool-3.10.0-1127.el7, kernel-3.10.0-1127.el7, kernel-abi-whitelists-3.10.0-1127.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-1127.el7
    • Red Hat Enterprise Linux Server (v. 7) bpftool-3.10.0-1127.el7, kernel-3.10.0-1127.el7, kernel-abi-whitelists-3.10.0-1127.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debug-devel-3.10.0-1127.el7, kernel-tools-libs-devel-3.10.0-1127.el7
    • Red Hat Enterprise Linux Workstation (v. 7) bpftool-3.10.0-1127.el7, kernel-3.10.0-1127.el7, kernel-abi-whitelists-3.10.0-1127.el7 +8
    • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-1127.el7

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: Out of support scope
Red Hat Enterprise Linux 6AffectedNo 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-2020:1016
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2020:1016
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2020:1016
Red Hat Enterprise Linux ComputeNode EUS (v. 7.6)Fixed RHSA-2020:2851
Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)Fixed RHSA-2020:2522
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2020:1016
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6)Fixed RHSA-2020:2851
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7)Fixed RHSA-2020:2522
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2020:1016
Red Hat Enterprise Linux Server EUS (v. 7.6)Fixed RHSA-2020:2851
Red Hat Enterprise Linux Server EUS (v. 7.7)Fixed RHSA-2020:2522
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2020:1016
Red Hat Enterprise Linux Server Optional EUS (v. 7.6)Fixed RHSA-2020:2851
Red Hat Enterprise Linux Server Optional EUS (v. 7.7)Fixed RHSA-2020:2522
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2020:1016
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2020:1016
Red Hat Enterprise Linux for Real Time (v. 7)Fixed RHSA-2020:1070
Red Hat Enterprise Linux for Real Time for NFV (v. 7)Fixed RHSA-2020:1070
Red Hat Virtualization 4.2 Hypervisor for RHEL 7.6 EUSFixed RHSA-2020:2851
Not affected: 5 products
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.6)
  • Red Hat Enterprise Linux Server EUS (v. 7.6)
  • Red Hat Virtualization 4.2 Hypervisor for RHEL 7.6 EUS

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-7191
  2. 2026-10-03 Alias added: GHSA-p54q-624c-fr42
  3. 2026-10-14 EPSS moved to the 50th–90th percentile

References

Exploit 1

Patch 5

Advisory 4

  • 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