CVE-2026-72693

HIGHPre-NVD 7.87.8
EchelonGraph scoreMEDIUM confidence

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

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-11. A secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-55978 (ENISA EUVD) · GHSA-6766-cx7r-c5q6 (GitHub Security Advisories)Source: ENISA EUVD

7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

openvt -u is intended to identify the owner of the current VT and then execute login as that user from a privileged context. In the documented kbrequest/init usage, the ownership test in authenticate_user() relies on stat("/proc//fd/0"). stat() on /proc//fd/0 follows the symlink to the underlying TTY device node. As a result, buf.st_uid reflects the owner of the TTY node rather than the owner of the process holding the file descriptor. If the TTY owner returns to root or the getty owner after logout while an unprivileged process still has fd 0 attached to that TTY, the check can incorrectly treat that process as belonging to the privileged console owner. Once that check succeeds, the -u path executes a passwordless login as the selected user. In the documented kbrequest/init deployment using openvt -us, this can result in passwordless login -f root on the spawned VT. This report establishes that privilege escalation path for that documented deployment; it does not claim equivalent reachability for deployments that do not use openvt -u from a privileged kbrequest/init path.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity78% × 45%
Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 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 low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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
0.1%
EPSS %ILE
1st
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.

EG Severity
7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-28). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (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

August 11, 2026

Last Modified

October 9, 2026

Advisory Details (2)

Auto-updated Aug 11, 2026
Patch available. Sources: redhat.
Red Hat

2462115 – (CVE-2026-72693) CVE-2026-72693 kbd: Local privilege escalation in openvt via incorrect process owner verification allowing passwordless root login

https://bugzilla.redhat.com/show_bug.cgi?id=2462115
Red HatMentions a patch (unverified)

CVE-2026-72693 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-72693

Patch Availability(6)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatkbd-0:2.0.4-11.el8_10.12026-10-08redhat
redhatopenshift/ose-rhel-coreos-9:4.22.9.8.202609081748-02026-09-15redhat
redhatopenshift/ose-rhel-coreos-9:4.22.9.8.202608251819-02026-09-01redhat
redhatkbd-0:2.6.4-8.el10_22026-08-20redhat
redhatkbd-0:2.4.0-12.el9_82026-08-20redhat
redhatkbd-main-2.10.0-2.hum12026-07-16redhat

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
kbd2.10.0-1 ... 2.9.0-1 (10 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
kbd2.10.0-1, 2.7.1-2, 2.7.1-2+exp1, 2.9.0-1
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
kbd2.10.0-1, 2.7.1-2, 2.7.1-2+exp1, 2.9.0-1
  • every version on: no fix on record
—

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 9× in last 7d / 70× 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 100 of 365 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. None are among the latest 100 rows. The 265 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  4. 2026-10-28 22:11 UTCEG score recompute
  5. 2026-10-28 22:11 UTCVendor advisory
  6. 2026-10-28 22:11 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  7. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  8. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  9. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  10. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  11. 2026-10-25 14:06 UTCEG score recompute
  12. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  13. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  14. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  15. 2026-10-20 23:16 UTCEG score recompute
  16. 2026-10-20 23:16 UTCVendor advisory
  17. 2026-10-20 23:16 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  18. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  20. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  21. 2026-10-18 03:15 UTCEG score recompute
  22. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  23. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  24. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  25. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
Show 75 more
  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-10-13 08:07 UTCEG score recompute
  3. 2026-10-13 08:07 UTCVendor advisory
  4. 2026-10-13 08:07 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  5. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  6. 2026-10-12 15:41 UTCEG score recompute
  7. 2026-10-11 19:27 UTCEG score recompute
  8. 2026-10-11 16:42 UTCEG score recompute
  9. 2026-10-11 14:02 UTCEG score recompute
  10. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  11. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  13. 2026-10-09 04:26 UTCEG score recompute
  14. 2026-10-09 04:26 UTCVendor advisory
  15. 2026-10-09 04:26 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  16. 2026-10-09 03:53 UTCEG score recompute
  17. 2026-10-09 03:53 UTCVendor advisory
  18. 2026-10-09 03:53 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  19. 2026-10-08 23:22 UTCEG score recompute
  20. 2026-10-08 23:22 UTCVendor advisory
  21. 2026-10-08 23:22 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  22. 2026-10-08 22:59 UTCEG score recompute
  23. 2026-10-08 22:59 UTCVendor advisory
  24. 2026-10-08 22:59 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  25. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  26. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  27. 2026-10-07 05:32 UTCVendor advisory
  28. 2026-10-07 05:32 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  29. 2026-10-06 18:06 UTCEG score recompute
  30. 2026-10-06 18:06 UTCVendor advisory
  31. 2026-10-06 18:06 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  32. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  33. 2026-10-05 18:20 UTCEG score recompute
  34. 2026-10-05 18:20 UTCVendor advisory
  35. 2026-10-05 18:20 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  36. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  37. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  38. 2026-10-04 22:48 UTCVendor advisory
  39. 2026-10-04 22:48 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  40. 2026-10-04 09:17 UTCVendor advisory
  41. 2026-10-04 09:17 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  42. 2026-10-03 21:38 UTCEG score recompute
  43. 2026-10-03 21:38 UTCVendor advisory
  44. 2026-10-03 21:38 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  45. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  46. 2026-10-02 22:30 UTCEG score recompute
  47. 2026-10-02 22:30 UTCVendor advisory
  48. 2026-10-02 22:30 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  49. 2026-10-02 09:14 UTCEG score recompute
  50. 2026-10-02 09:14 UTCVendor advisory
  51. 2026-10-02 09:14 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  52. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  53. 2026-10-01 10:02 UTCVendor advisory
  54. 2026-10-01 10:02 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  55. 2026-09-30 22:22 UTCEG score recompute
  56. 2026-09-30 22:22 UTCVendor advisory
  57. 2026-09-30 22:22 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  58. 2026-09-29 05:19 UTCEG score recompute
  59. 2026-09-29 05:19 UTCVendor advisory
  60. 2026-09-29 05:19 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  61. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  62. 2026-09-28 13:36 UTCVendor advisory
  63. 2026-09-28 13:36 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  64. 2026-09-28 02:21 UTCEG score recompute
  65. 2026-09-28 02:21 UTCVendor advisory
  66. 2026-09-28 02:21 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  67. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  68. 2026-09-27 11:03 UTCEG score recompute
  69. 2026-09-27 11:03 UTCVendor advisory
  70. 2026-09-27 11:03 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  71. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  72. 2026-09-25 03:58 UTCEG score recompute
  73. 2026-09-25 03:58 UTCVendor advisory
  74. 2026-09-25 03:58 UTCGHSA enrichmentGHSA-6766-cx7r-c5q6 · GitHub severity HIGH · GitHub CVSS 7.8
  75. 2026-09-24 08:23 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-72693?
CVE-2026-72693 is a high-severity vulnerability; its CVE record was published on August 11, 2026. openvt -u is intended to identify the owner of the current VT and then execute login as that user from a privileged context. In the documented kbrequest/init usage, the ownership test in authenticate_user() relies on stat("/proc/<pid>/fd/0"). stat() on /proc/<pid>/fd/0 follows the symlink to the…
When was CVE-2026-72693 made public?
CVE-2026-72693 was made public on August 11, 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 August 11, 2026. EchelonGraph's copy of the record carries a last-modified date of October 9, 2026; the record at its source may have been updated since.
Is CVE-2026-72693 actively exploited?
CVE-2026-72693 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-72693?
CVE-2026-72693 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-72693?
A fix for CVE-2026-72693 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-72693 are linked in the Vendor Advisories panel on this page.

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