CVE-2026-72492

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-15. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: 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:

ksmbd: fix use-after-free in same_client_has_lease()

same_client_has_lease() returns an opinfo pointer from ci->m_op_list after dropping ci->m_lock without taking a reference.

smb_grant_oplock() then dereferences that pointer in copy_lease() and when checking breaking_cnt. A concurrent close can remove the old lease from ci->m_op_list and drop the last reference before the caller uses the returned pointer, leading to a use-after-free.

Take a reference when same_client_has_lease() selects an existing lease, drop any previous match while scanning, and release the returned reference in smb_grant_oplock() after copying the lease state.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
39%
KEV
Not listed

Published

August 15, 2026

Last Modified

August 17, 2026

Advisory Details (7)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

ksmbd: fix use-after-free in same_client_has_lease() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/aaa3bb2bbf2ccbfea9e4e0b9dabf3afc60b50cd0
generic

ksmbd: fix use-after-free in same_client_has_lease() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7c3264d273d524aa6adcce23c01087271f13586f
generic

ksmbd: fix use-after-free in same_client_has_lease() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/79c7c59bb519db6f5a2a151965e825ec725614cc
generic

ksmbd: fix use-after-free in same_client_has_lease() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/65b655f65c3ca1ab5d598d3832bb0ff531725858
generic

ksmbd: fix use-after-free in same_client_has_lease() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/35d3d6ff2bc1e7aaecb15d5377ebbd6227acae0d
generic

ksmbd: fix use-after-free in same_client_has_lease() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0ff82a9cf9312678d8bc4edeef0b6e82659ac12a
generic

ksmbd: fix use-after-free in same_client_has_lease() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/09634cd055d9bd8dd167995ea52bcd8028dd5dac

Vendor Advisories for CVE-2026-72492(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 27× in last 7d / 27× 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. 2026-08-20 08:58 UTCGHSA enrichment
  2. 2026-08-19 20:34 UTCEG score recompute
  3. 2026-08-19 20:34 UTCGHSA enrichment
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 08:10 UTCGHSA enrichment
  6. 2026-08-18 19:46 UTCEG score recompute
  7. 2026-08-18 19:46 UTCGHSA enrichment
  8. 2026-08-18 13:49 UTCEPSS rescore
  9. 2026-08-18 13:49 UTCEPSS rescore
  10. 2026-08-18 07:22 UTCGHSA enrichment
  11. 2026-08-17 18:59 UTCEG score recompute
  12. 2026-08-17 18:58 UTCGHSA enrichment
  13. 2026-08-17 13:47 UTCEPSS rescore
  14. 2026-08-17 06:27 UTCEG score recompute
  15. 2026-08-17 06:27 UTCGHSA enrichment
  16. 2026-08-17 05:57 UTCEG score recompute▲ 8.80
  17. 2026-08-17 05:57 UTCGHSA enrichment
  18. 2026-08-17 05:54 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  19. 2026-08-17 05:28 UTCEG score recompute
  20. 2026-08-17 05:28 UTCGHSA enrichment
  21. 2026-08-17 05:24 UTCMITRE cvelistV5
  22. 2026-08-16 14:56 UTCEPSS rescore
  23. 2026-08-16 14:56 UTCEPSS rescore
  24. 2026-08-16 02:15 UTCEPSS rescore
  25. 2026-08-15 06:23 UTCNVD update
Show 2 more
  1. 2026-08-15 06:03 UTCEG score recompute
  2. 2026-08-15 06:02 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-72492?
CVE-2026-72492 is a high vulnerability published on August 15, 2026. In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in sameclienthas_lease() sameclienthaslease() returns an opinfo pointer from ci->mop_list after dropping ci->m_lock without taking a reference. smbgrantoplock() then dereferences that pointer in…
When was CVE-2026-72492 disclosed?
CVE-2026-72492 was first published in the National Vulnerability Database on August 15, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-72492 actively exploited?
CVE-2026-72492 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 60.6% of all scored CVEs.
What is the CVSS score of CVE-2026-72492?
CVE-2026-72492 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-72492?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72492, 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

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