CVE-2026-72243

HIGHPre-NVD 8.48.4—
EchelonGraph scoreMEDIUM confidence

Score 8.4 from GitHub Security Advisory (severity: HIGH) published 2026-08-15. A secondary CVSS source baseline 8.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 8.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

selinux: check connect-related permissions on TCP Fast Open

Similar to Landlock, SELinux was not updated when TCP Fast Open support was introduced to ensure connect-related permissions are checked when using TCP Fast Open. Update its socket_sendmsg() hook to call selinux_socket_connect() when MSG_FASTOPEN is passed.

CVSS v3
8.4
EG Score
8.4HIGHmedium confidence
EG Risk
42
EG Risk 42/100CISA SSVC

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
Severity84% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.2%
EPSS %ILE
5th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 15, 2026

Last Modified

August 18, 2026

Advisory Details (6)

Auto-updated Aug 17, 2026
Patch available.
generic

selinux: check connect-related permissions on TCP Fast Open - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fc633a598206d4f23af782db7c0b5f3a82751d2c
generic

selinux: check connect-related permissions on TCP Fast Open - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e507633bf76bccf1a6af27771fb0d6e2862b7eac
generic

selinux: check connect-related permissions on TCP Fast Open - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d028bc080a0dcd6a7f8e1ae1bd32dda696505ba3
generic

selinux: check connect-related permissions on TCP Fast Open - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/646ebbc5f2ff9147d084e1213143f091026a611c
generic

selinux: check connect-related permissions on TCP Fast Open - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/44c74d27d1b9aaa99fa8a83640c1223575262b80
generic

selinux: check connect-related permissions on TCP Fast Open - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/11406d0d7e11b4e525bb2ace2c70107031d058da

Vendor Advisories for CVE-2026-72243(3)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatkernel-0:6.12.0-211.59.1.el10_22026-09-24redhat
redhatkernel-0:5.14.0-687.49.1.el9_82026-09-17redhat

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
linux6.1.106-1 ... 6.1.99-1 (55 versions)
  • every version up to 6.1.180-1: fixed in 6.1.180-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.96-1 (31 versions)
  • every version up to 6.12.100-1: fixed in 6.12.100-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (160 versions)
  • every version up to 7.1.5-1: fixed in 7.1.5-1
—

Data Freshness Timeline

(refreshed 28× in last 7d / 114× 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.

Showing the most recent 100 of 199 total refreshes for this CVE.

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

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2026-72243?
CVE-2026-72243 is a high vulnerability published on August 15, 2026. In the Linux kernel, the following vulnerability has been resolved: selinux: check connect-related permissions on TCP Fast Open Similar to Landlock, SELinux was not updated when TCP Fast Open support was introduced to ensure connect-related permissions are checked when using TCP Fast Open. Update…
When was CVE-2026-72243 disclosed?
CVE-2026-72243 was first published on August 15, 2026, with the most recent update on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-72243 actively exploited?
CVE-2026-72243 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-72243?
CVE-2026-72243 has a CVSS base score of 8.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-72243?
A fix for CVE-2026-72243 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-72243 are linked in the Vendor Advisories panel on this page.

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