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CVE-2026-100081ImportantLocalRevised 14 Nov

xen-netback: defer xenvif_mcast_addr_list_free()

No KEV listing collectedCVSS 7.8Fix not stated
MSRC advisory NVD CVE.org

Assessment

Severity
Important
CVSS base score
7.8
Impact
Not stated
Exploitation detected
Unknown: not stated by MSRC
Exploitability
Not assessed
Publicly disclosed
Unknown: not stated by MSRC
EPSS · 30-day forecast
No EPSS score collected
Customer action
Required: follow the MSRC remediation guidance
More details
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Public detection template
No Nuclei template is listed in the current collected catalog
Component
Mariner
Weakness
—
Issued by
Linux
Published
8 Nov 2026 · November 2026
Last revised
14 Nov 2026Information published.
CVSS 3.1 base metricsRed raises the risk · green lowers it
Attack vector
LocalAV:L
Attack complexity
HighAC:H
Privileges required
LowPR:L
User interaction
NoneUI:N
Scope
ChangedS:C
Confidentiality
HighC:H
Integrity
HighI:H
Availability
HighA:H

Updates that fix it

0 KBs

No KB listed

No KB update is listed in the collected MSRC record. Check the MSRC advisory for product releases and other remedies.

Affected products

Open Source Software
3 affected products
  • azl3 kernel 6.6.161.1-1 on Azure Linux 3.0
  • azl4 kernel 6.18.57-1.6.azl4 on Azure Linux 4.0
  • azl4 kernel 6.18.57-1.7.azl4 on Azure Linux 4.0

What changed

  1. Affected products: azl3 kernel 6.6.161.1-1 on Azure Linux 3.0, azl4 kernel 6.18.57-1.6.azl4 on Azure Linux 4.0 → azl3 kernel 6.6.161.1-1 on Azure Linux 3.0, azl4 kernel 6.18.57-1.6.azl4 on Azure Linux 4.0, azl4 kernel 6.18.57-1.7.azl4 on Azure Linux 4.0
  2. Affected products: azl3 kernel 6.6.161.1-1 on Azure Linux 3.0 → azl3 kernel 6.6.161.1-1 on Azure Linux 3.0, azl4 kernel 6.18.57-1.6.azl4 on Azure Linux 4.0 · CVSS vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H → CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H · CVSS score: 6.0 → 7.8 · Severity: Moderate → Important
  3. Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  4. Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
Page history

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Cite this version
Field-level log (15)

Up to 100 recent field edits are shown; older edits may be outside retention.

  1. 15 Nov 2026 · 08:08:43 UTC Last revised13 Nov 2026 20:44 UTC → 14 Nov 2026 09:57 UTC
  2. 15 Nov 2026 · 08:08:43 UTC Affected productsazl3 kernel 6.6.161.1-1 on Azure Linux 3.0, azl4 kernel 6.18.57-1.6.azl4 on Azure Linux 4.0 → azl3 kernel 6.6.161.1-1 on Azure Linux 3.0, azl4 kernel 6.18.57-1.6.azl4 on Azure Linux 4.0, azl4 kernel 6.18.57-1.7.azl4 on Azure Linux 4.0
  3. 14 Nov 2026 · 08:16:23 UTC Last revised9 Nov 2026 14:42 UTC → 13 Nov 2026 20:44 UTC
  4. 14 Nov 2026 · 08:16:23 UTC Affected productsazl3 kernel 6.6.161.1-1 on Azure Linux 3.0 → azl3 kernel 6.6.161.1-1 on Azure Linux 3.0, azl4 kernel 6.18.57-1.6.azl4 on Azure Linux 4.0
  5. 14 Nov 2026 · 08:16:23 UTC CVSS vectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H → CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
  6. 14 Nov 2026 · 08:16:23 UTC CVSS base score6.0 → 7.8
  7. 14 Nov 2026 · 08:16:23 UTC SeverityModerate → Important
  8. 13 Nov 2026 · 12:10:20 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  9. 13 Nov 2026 · 12:10:20 UTC Source coverage: public-exploit-codeIncomplete → Current
  10. 13 Nov 2026 · 12:10:20 UTC Source coverage: first-epssIncomplete → Current
  11. 13 Nov 2026 · 12:10:20 UTC Source coverage: msrc-cvrfIncomplete → Current
  12. 13 Nov 2026 · 11:07:20 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  13. 13 Nov 2026 · 11:07:20 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  14. 13 Nov 2026 · 11:07:20 UTC Source coverage: first-epssCurrent → Incomplete
  15. 13 Nov 2026 · 11:07:20 UTC Source coverage: msrc-cvrfCurrent → Incomplete

Explore global source statements, affected packages and advisory history for CVE-2026-100081. The catalog has a separate collection scope from Microsoft release records.

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CVE-2026-100081 · CVE overview and exploitation status

cve-program · CVE-2026-100081

Related changes

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