Vulnerability in Linux kernel (CVE-2026-90168)
Summary
Vulnerability in Linux kernel (CVE-2026-90168). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: retain connection for pending notify work
Deferred CHANGE_NOTIFY work keeps an async message ID after the original
request work is released. A durable handle can outlive its connection, so
the connection teardown can destroy its async IDA before the handle close
releases the pending notify work.
Give the synthetic deferred work a connection reference. Release it after
the async ID in ksmbd_free_work_struct(). This keeps the async IDA alive
until the deferred work is released, even when the original connection has
already left the connection list.
During server shutdown there is no client to receive a cleanup response.
Skip the write and only release the pending work.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-90168 has been found in Linux kernel.
Risk of unauthorized operations or information disclosure.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Linux kernel CVE-2026-90168" on the vendor's site.
CVE-2026-90168 (Linux kernel)
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (unclassified) exists in Linux kernel.
Check the vendor advisory for the affected versions of Linux kernel.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Linux kernel を使っているサービスとバージョンを洗い出す。
-
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-90168 linux
- Ubuntu UBUNTU-CVE-2026-90168 linux
References
- web nvd.nist.gov
- web git.kernel.org
- web git.kernel.org
- web github.com