CVE-2026-3184

MEDIUMNVD 5.35.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.4% (36th percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 3.7 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-04-03) is not newer than that change (2026-08-31), so it does not.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
5.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in util-linux. Improper hostname canonicalization in the login(1) utility, when invoked with the -h option, can modify the supplied remote hostname before setting PAM_RHOST. A remote attacker could exploit this by providing a specially crafted hostname, potentially bypassing host-based Pluggable Authentication Modules (PAM) access control rules that rely on fully qualified domain names. This could lead to unauthorized access.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity53% × 45%
The EG Score, 5.3 of 10.
Exploitation0.6% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
36th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

April 3, 2026

Last Modified

August 31, 2026

Advisory Details (3)

Auto-updated Jul 21, 2026
Patch available. Sources: redhat.
Red Hat

2442570 – (CVE-2026-3184) CVE-2026-3184 util-linux: util-linux: Access control bypass due to improper hostname canonicalization

https://bugzilla.redhat.com/show_bug.cgi?id=2442570
Red HatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2026-3184
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:7180

Vendor Advisories for CVE-2026-3184(2)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatutil-linux-main-2.42-7.1.hum12026-04-09redhat

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.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
util-linux2.36.1-8 ... 2.42~rc2-1 (140 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
util-linux2.38.1-5 ... 2.42~rc2-1 (120 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
util-linux2.41-5 ... 2.42~rc2-1 (36 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
util-linux2.41-5 ... 2.42~rc2-1 (17 versions)
  • every version up to 2.42-1: fixed in 2.42-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 28× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 216 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 117 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  2. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  3. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  4. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  5. 2026-10-12 16:14 UTCEG score recompute
  6. 2026-10-11 19:57 UTCEG score recompute
  7. 2026-10-11 17:10 UTCEG score recompute
  8. 2026-10-11 14:38 UTCEG score recompute
  9. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  12. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  14. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  17. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  18. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  20. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  21. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  22. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  23. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  24. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  25. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 37th percentile
Show 74 more
  1. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  2. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  3. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  4. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  5. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  6. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  7. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  8. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  9. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  10. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  11. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  12. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  13. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  14. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  15. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  16. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  17. 2026-08-31 12:28 UTCVendor advisory
  18. 2026-08-31 12:28 UTCGHSA enrichmentGHSA-qp7r-5rpf-pwxg · GitHub severity LOW · GitHub CVSS 3.7
  19. 2026-08-31 11:55 UTCEG score recompute
  20. 2026-08-31 11:55 UTCVendor advisory
  21. 2026-08-31 11:55 UTCGHSA enrichmentGHSA-qp7r-5rpf-pwxg · GitHub severity LOW · GitHub CVSS 3.7
  22. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  23. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  24. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  25. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  26. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  27. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  28. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  29. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  30. 2026-08-21 13:22 UTCVendor advisory
  31. 2026-08-21 13:22 UTCGHSA enrichmentGHSA-qp7r-5rpf-pwxg · GitHub severity LOW · GitHub CVSS 3.7
  32. 2026-08-21 13:09 UTCEG score recompute
  33. 2026-08-21 13:09 UTCVendor advisory
  34. 2026-08-21 13:09 UTCGHSA enrichmentGHSA-qp7r-5rpf-pwxg · GitHub severity LOW · GitHub CVSS 3.7
  35. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  36. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  37. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  38. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  39. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  40. 2026-08-16 08:37 UTCEG score recompute
  41. 2026-08-16 08:37 UTCVendor advisory
  42. 2026-08-16 08:37 UTCGHSA enrichmentGHSA-qp7r-5rpf-pwxg · GitHub severity LOW · GitHub CVSS 3.7
  43. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  44. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  45. 2026-08-14 05:41 UTCEG score recompute
  46. 2026-08-14 05:41 UTCVendor advisory
  47. 2026-08-14 05:41 UTCGHSA enrichmentGHSA-qp7r-5rpf-pwxg · GitHub severity LOW · GitHub CVSS 3.7
  48. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  49. 2026-08-12 19:57 UTCEG score recompute
  50. 2026-08-12 19:57 UTCVendor advisory
  51. 2026-08-12 19:57 UTCGHSA enrichmentGHSA-qp7r-5rpf-pwxg · GitHub severity LOW · GitHub CVSS 3.7
  52. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  53. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  54. 2026-08-11 06:12 UTCEG score recompute
  55. 2026-08-11 06:12 UTCVendor advisory
  56. 2026-08-11 06:12 UTCGHSA enrichmentGHSA-qp7r-5rpf-pwxg · GitHub severity LOW · GitHub CVSS 3.7
  57. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  58. 2026-08-10 05:43 UTCEG score recompute
  59. 2026-08-10 05:43 UTCVendor advisory
  60. 2026-08-10 05:43 UTCGHSA enrichmentGHSA-qp7r-5rpf-pwxg · GitHub severity LOW · GitHub CVSS 3.7
  61. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  62. 2026-08-09 05:13 UTCEG score recompute
  63. 2026-08-09 05:13 UTCVendor advisory
  64. 2026-08-09 05:13 UTCGHSA enrichmentGHSA-qp7r-5rpf-pwxg · GitHub severity LOW · GitHub CVSS 3.7
  65. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  66. 2026-08-07 15:20 UTCEG score recompute
  67. 2026-08-07 15:20 UTCVendor advisory
  68. 2026-08-07 15:19 UTCGHSA enrichmentGHSA-qp7r-5rpf-pwxg · GitHub severity LOW · GitHub CVSS 3.7
  69. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  70. 2026-08-06 00:19 UTCEG score recompute
  71. 2026-08-06 00:19 UTCVendor advisory
  72. 2026-08-06 00:18 UTCGHSA enrichmentGHSA-qp7r-5rpf-pwxg · GitHub severity LOW · GitHub CVSS 3.7
  73. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  74. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.4% · 35th percentile

Related CVEs(same product + same vendor + same CWE)

Same vendor

2 shown

redhat:RHSA-2026:7180

Frequently asked(5)

What is CVE-2026-3184?
CVE-2026-3184 is a medium-severity vulnerability; its CVE record was published on April 3, 2026. A flaw was found in util-linux. Improper hostname canonicalization in the login(1) utility, when invoked with the -h option, can modify the supplied remote hostname before setting PAM_RHOST. A remote attacker could exploit this by providing a specially crafted hostname, potentially bypassing…
When was CVE-2026-3184 made public?
CVE-2026-3184 was made public on February 25, 2026: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on April 3, 2026. EchelonGraph's copy of the record carries a last-modified date of August 31, 2026; the record at its source may have been updated since.
Is CVE-2026-3184 actively exploited?
CVE-2026-3184 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-3184?
CVE-2026-3184 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-3184?
A fix for CVE-2026-3184 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-3184 are linked in the Vendor Advisories panel on this page.

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