CVE-2018-7191

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 0.7%, top 52% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 3 sources updated this week
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 5.5Exploit: NoneExposed: 0

A fix is available — apply it.

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.

CVSS v3
5.5
EG Score
5.5(medium)
EPSS
47.5%
KEV
Not listed

Published

May 17, 2019

Last Modified

November 21, 2024

References (22)

Vendor Advisories for CVE-2018-7191(3)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatkernel-0:3.10.0-957.56.1.el72020-07-07redhat
redhatkernel-0:3.10.0-1062.26.1.el72020-06-11redhat
redhatkernel-rt-0:3.10.0-1127.rt56.1093.el72020-03-31redhat
redhatkernel-0:3.10.0-1127.el72020-03-31redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 12× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 22:17 UTCEG score recompute
  2. 2026-07-22 14:05 UTCEPSS rescore
  3. 2026-07-21 15:22 UTCEPSS rescore
  4. 2026-07-20 17:04 UTCEPSS rescore
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  6. 2026-07-20 16:04 UTCOSV refresh
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  1. 2026-07-05 02:27 UTCEPSS rescore
  2. 2026-07-04 06:28 UTCEPSS rescore
  3. 2026-07-04 06:28 UTCEPSS rescore
  4. 2026-07-03 11:26 UTCOSV refresh
  5. 2026-07-01 15:03 UTCEPSS rescore
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  35. 2026-06-15 01:43 UTCOSV refresh
  36. 2026-06-14 23:15 UTCEPSS rescore
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  38. 2026-06-13 22:58 UTCEPSS rescore
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  41. 2026-06-11 13:57 UTCEPSS rescore
  42. 2026-06-10 22:16 UTCEPSS rescore
  43. 2026-06-10 13:19 UTCEPSS rescore
  44. 2026-06-08 14:14 UTCEPSS rescore
  45. 2026-06-07 15:22 UTCEPSS rescore
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  47. 2026-06-06 13:45 UTCEPSS rescore
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  49. 2026-06-05 22:45 UTCEPSS rescore
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  63. 2026-05-28 13:42 UTCEPSS rescore
  64. 2026-05-27 19:29 UTCEG score recompute
  65. 2026-05-27 19:29 UTCVendor advisory
  66. 2026-05-27 19:29 UTCGHSA enrichment
  67. 2026-05-27 13:38 UTCEPSS rescore
  68. 2026-05-26 13:42 UTCEPSS rescore
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  70. 2026-05-26 07:17 UTCEPSS rescore
  71. 2026-05-26 07:17 UTCEPSS rescore
  72. 2026-05-23 03:57 UTCOSV refresh

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2018-7191?
CVE-2018-7191 is a medium vulnerability published on May 17, 2019. In the tun subsystem in the Linux kernel before 4.13.14, devgetvalidname is not called before registernetdevice. 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…
When was CVE-2018-7191 disclosed?
CVE-2018-7191 was first published in the National Vulnerability Database on May 17, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-7191 actively exploited?
CVE-2018-7191 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 47.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2018-7191?
CVE-2018-7191 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2018-7191?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-7191, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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