CVE-2026-90156

UNRATEDCVSS · not yet scoredTrending — 4 sources updated this week
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EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS v2: —Exploit: None knownExposed services: Not assessed

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

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

ksmbd: safely discard unregistered deferred locks

When vfs_lock_file() defers a lock, smb2_lock() puts its ksmbd_lock on rollback_list before allocating and registering the asynchronous work. If either operation fails, rollback assumes that smb_lock->conn is initialized and dereferences NULL. The deferred file_lock also remains linked into the VFS blocked-lock state while it is freed.

Keep the lock off rollback_list until async setup succeeds. On setup failures, explicitly unblock and wake the deferred lock before freeing it and its ksmbd wrapper.

CVSS v3
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EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
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EPSS PROB
0.2%
EPSS %ILE
8th
KEV
Not listed

Published

September 17, 2026

Last Modified

September 18, 2026

References (2)

Vendor Advisories for CVE-2026-90156(2)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 7.2~rc7-1~exp1 (358 versions)
  • every version on: no fix on record
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Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (181 versions)
  • every version on: no fix on record
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Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (178 versions)
  • every version up to 7.2.6-1: fixed in 7.2.6-1
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Data Freshness Timeline

(refreshed 10× in last 7d / 31× 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. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-03 09:09 UTCVendor advisory
  3. 2026-10-03 09:09 UTCGHSA enrichment
  4. 2026-10-01 19:51 UTCEPSS rescore
  5. 2026-09-30 15:04 UTCEPSS rescore
  6. 2026-09-30 11:05 UTCEG score recompute
  7. 2026-09-30 11:05 UTCVendor advisory
  8. 2026-09-30 11:05 UTCGHSA enrichment
  9. 2026-09-28 13:52 UTCEPSS rescore
  10. 2026-09-28 13:52 UTCEPSS rescore
  11. 2026-09-27 13:49 UTCEPSS rescore
  12. 2026-09-27 13:05 UTCVendor advisory
  13. 2026-09-27 13:05 UTCGHSA enrichment
  14. 2026-09-26 15:59 UTCEPSS rescore
  15. 2026-09-24 15:05 UTCVendor advisory
  16. 2026-09-24 15:05 UTCGHSA enrichment
  17. 2026-09-24 14:04 UTCEPSS rescore
  18. 2026-09-22 16:01 UTCEPSS rescore
  19. 2026-09-21 21:09 UTCEPSS rescore
  20. 2026-09-21 16:57 UTCEG score recompute
  21. 2026-09-21 16:57 UTCVendor advisory
  22. 2026-09-21 16:57 UTCGHSA enrichment
  23. 2026-09-20 20:16 UTCEPSS rescore
  24. 2026-09-18 19:28 UTCEPSS rescore
  25. 2026-09-18 18:31 UTCGHSA enrichment
Show 6 more
  1. 2026-09-18 18:26 UTCNVD update
  2. 2026-09-18 17:54 UTCGHSA enrichment
  3. 2026-09-18 17:54 UTCMITRE cvelistV5
  4. 2026-09-17 17:23 UTCNVD update
  5. 2026-09-17 16:45 UTCEG score recompute
  6. 2026-09-17 16:19 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-90156?
CVE-2026-90156 is a publicly disclosed vulnerability published on September 17, 2026. In the Linux kernel, the following vulnerability has been resolved: ksmbd: safely discard unregistered deferred locks When vfslockfile() defers a lock, smb2lock() puts its ksmbdlock on rollback_list before allocating and registering the asynchronous work. If either operation fails, rollback assumes…
When was CVE-2026-90156 disclosed?
CVE-2026-90156 was first published on September 17, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-90156 actively exploited?
CVE-2026-90156 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (8th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-90156?
No fix for CVE-2026-90156 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-90156 are linked in the Vendor Advisories panel on this page.

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