CVE-2026-90169

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: free preauth sessions on connection teardown

SMB3.1.1 multichannel binding preserves the preauthentication hash in a preauth_session between the NTLM negotiate and authenticate requests. The binding NTLM negotiate allocates this object and returns STATUS_MORE_PROCESSING_REQUIRED. If the client disconnects before it sends the authenticate request, neither the authenticate nor error cleanup paths free the object.

Release any remaining preauthentication sessions when tearing down the connection. Initialize the list when allocating the connection so that this cleanup is safe regardless of the negotiated dialect.

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
13th
KEV
Not listed

Published

September 17, 2026

Last Modified

September 17, 2026

References (5)

Vendor Advisories for CVE-2026-90169(2)

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

Affected Packages

(4 across 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 7.2~rc7-1~exp1 (360 versions)
  • every version on: no fix on record
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linux-6.126.12.100-1~deb12u1, 6.12.101-1~deb12u1, 6.12.107-1~deb12u1
  • every version up to 6.12.111-1~deb12u1: fixed in 6.12.111-1~deb12u1
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Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (35 versions)
  • every version up to 6.12.111-1: fixed in 6.12.111-1
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Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (179 versions)
  • every version up to 7.2.6-1: fixed in 7.2.6-1
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Data Freshness Timeline

(refreshed 12× in last 7d / 30× 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. 2026-10-04 02:50 UTCVendor advisory
  3. 2026-10-04 02:50 UTCGHSA enrichment
  4. 2026-10-01 19:51 UTCEPSS rescore
  5. 2026-10-01 09:23 UTCEG score recompute
  6. 2026-10-01 09:23 UTCVendor advisory
  7. 2026-10-01 09:23 UTCGHSA enrichment
  8. 2026-09-30 15:04 UTCEPSS rescore
  9. 2026-09-28 15:58 UTCVendor advisory
  10. 2026-09-28 15:58 UTCGHSA enrichment
  11. 2026-09-28 13:52 UTCEPSS rescore
  12. 2026-09-28 13:52 UTCEPSS rescore
  13. 2026-09-27 13:49 UTCEPSS rescore
  14. 2026-09-26 15:59 UTCEPSS rescore
  15. 2026-09-25 22:32 UTCVendor advisory
  16. 2026-09-25 22:32 UTCGHSA enrichment
  17. 2026-09-24 14:04 UTCEPSS rescore
  18. 2026-09-23 17:54 UTCEPSS rescore
  19. 2026-09-23 04:42 UTCVendor advisory
  20. 2026-09-23 04:42 UTCGHSA enrichment
  21. 2026-09-22 16:01 UTCEPSS rescore
  22. 2026-09-21 21:09 UTCEPSS rescore
  23. 2026-09-20 20:16 UTCEPSS rescore
  24. 2026-09-20 11:16 UTCEG score recompute
  25. 2026-09-20 11:16 UTCVendor advisory
Show 5 more
  1. 2026-09-20 11:16 UTCGHSA enrichment
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-17 17:23 UTCNVD update
  4. 2026-09-17 16:44 UTCEG score recompute
  5. 2026-09-17 16:19 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-90169?
CVE-2026-90169 is a publicly disclosed vulnerability published on September 17, 2026. In the Linux kernel, the following vulnerability has been resolved: ksmbd: free preauth sessions on connection teardown SMB3.1.1 multichannel binding preserves the preauthentication hash in a preauth_session between the NTLM negotiate and authenticate requests. The binding NTLM negotiate allocates…
When was CVE-2026-90169 disclosed?
CVE-2026-90169 was first published on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-90169 actively exploited?
CVE-2026-90169 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (13th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-90169?
No fix for CVE-2026-90169 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-2026-90169 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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