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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2026-98901

ksmbd: fix lease break and ack state handlingCVE-2026-98901

Answer in brief

CVE-2026-98901 records a Unknown severity vulnerability in ksmbd: fix lease break and ack state handling. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 23, 2026Updated Oct 23, 2026Source checked Oct 25, 2026First seen by HOL Oct 23, 2026Material review Oct 23, 2026
Upstream Advisory

Key facts

Risk
Unknown severitySource severity not reported
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <17699905a381621c1cee5b6528feb05acedc86a4 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3251ea36df5eef58aa207fbee48849d89b922ea6 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fba4653a0b4dc2f6d42600abe21fb326292f70ff || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5015191096db311759fef98769270336cd8b1324 || >=0 <6.6.158 || >=0 <6.12.111 || >=0 <6.18.5317699905a381621c1cee5b6528feb05acedc86a4, 3251ea36df5eef58aa207fbee48849d89b922ea6, fba4653a0b4dc2f6d42600abe21fb326292f70ff, 5015191096db311759fef98769270336cd8b1324, 6.6.158, 6.12.111, 6.18.53

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 17699905a381621c1cee5b6528feb05acedc86a4 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 23, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 23, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 23, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix lease break and ack state handling Do not skip valid lease states containing WRITE_CACHING when breaking level-II/read leases for writes and truncates. Handle lease break acknowledgments according to the SMB2 rule that the acknowledged state must be a subset of the server's break target. Apply the acknowledged state directly and keep the break pending on failed ACKs.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 25, 2026
References
4 linked sources
Open source record