CVE-2026-72243

HIGHPre-NVD 8.48.4
EchelonGraph scoreHIGH 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 — 5 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%CVSS: 8.4Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
8.4(high)
EG Risk
42(Track)
EG Risk 42/100SSVC: Track

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%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
6%
KEV
Not listed

Published

August 15, 2026

Last Modified

August 18, 2026

Advisory Details (6)

Auto-updated Aug 17, 2026
No patch confirmed yet.
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(1)

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

Data Freshness Timeline

(refreshed 34× in last 7d / 34× 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. 2026-08-21 01:10 UTCEG score recompute
  2. 2026-08-21 01:10 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 12:04 UTCGHSA enrichment
  5. 2026-08-19 22:47 UTCEG score recompute
  6. 2026-08-19 22:47 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 09:40 UTCGHSA enrichment
  9. 2026-08-18 20:31 UTCEG score recompute
  10. 2026-08-18 20:31 UTCGHSA enrichment
  11. 2026-08-18 13:49 UTCEPSS rescore
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 07:25 UTCEG score recompute
  14. 2026-08-18 07:25 UTCGHSA enrichment
  15. 2026-08-18 07:03 UTCEG score recompute
  16. 2026-08-18 07:03 UTCGHSA enrichment
  17. 2026-08-17 19:29 UTCEG score recompute
  18. 2026-08-17 19:29 UTCGHSA enrichment
  19. 2026-08-17 13:47 UTCEPSS rescore
  20. 2026-08-17 06:20 UTCEG score recompute
  21. 2026-08-17 06:20 UTCGHSA enrichment
  22. 2026-08-17 05:59 UTCEG score recompute 8.40
  23. 2026-08-17 05:59 UTCGHSA enrichment
  24. 2026-08-17 05:54 UTCMITRE cvelistV5CVSS v3 → 8.4 · severity → HIGH
  25. 2026-08-17 05:31 UTCEG score recompute
Show 9 more
  1. 2026-08-17 05:31 UTCGHSA enrichment
  2. 2026-08-17 05:24 UTCMITRE cvelistV5
  3. 2026-08-16 14:56 UTCEPSS rescore
  4. 2026-08-16 14:56 UTCEPSS rescore
  5. 2026-08-16 02:15 UTCEPSS rescore
  6. 2026-08-15 06:39 UTCGHSA enrichment
  7. 2026-08-15 06:23 UTCNVD update
  8. 2026-08-15 06:09 UTCEG score recompute
  9. 2026-08-15 06:02 UTCMITRE cvelistV5first tracked

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 in the National Vulnerability Database 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% probability of exploitation in the next 30 days, which ranks it in the top 94.2% of all scored CVEs.
What is the CVSS score of CVE-2026-72243?
CVE-2026-72243 has a CVSS v3 base score of 8.4 (NVD).
How do I remediate CVE-2026-72243?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72243, 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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-72243

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