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Fencer Vulns
critical 9.8

CVE-2026-105016 json

Microsoft QUIC Remote Code Execution Vulnerability

published 2026-10-13 26 d ago modified 2026-10-31 8 d ago also GHSA-5gjq-3f94-rcf7 , EUVD-2026-100459

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 76%
public exploits
0
none known

Summary

Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

Patch / fix

  • nuget Microsoft.Native.Quic.MsQuic.Schannel 2.5.11-ci.159417053
  • Microsoft .NET 10.0 runtime 10.0.14
  • Microsoft .NET 11.0 runtime 11.0.0-rc.2.26504.105
  • Microsoft .NET 8.0 runtime 8.0.32
  • Microsoft .NET 9.0 runtime 9.0.21
  • Microsoft Microsoft Visual Studio 2022 version 17.14 17.14.42
  • Microsoft Microsoft Visual Studio 2026 version 18.10 18.10.4
  • Microsoft Windows 11 version 23H2 10.0.22631.7652
  • Microsoft Windows 11 Version 24H2 10.0.26100.9711
  • Microsoft Windows 11 Version 25H2 10.0.26200.9711
  • Microsoft Windows 11 version 26H1 10.0.28000.3231
  • Microsoft Windows 11 Version 26H2 10.0.26300.9711
  • Microsoft Windows Server 2022 10.0.20348.5761
  • Microsoft Windows Server 2025 10.0.26100.33650
  • Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.33650
  • dotnet8-runtime Alpine 3.24, Alpine 3.23, Alpine 3.22 8.0.32-r0
  • dotnet9-runtime Alpine 3.24, Alpine 3.23, Alpine 3.22 9.0.21-r0
  • dotnet10-runtime Alpine 3.24, Alpine 3.23 10.0.13-r0

alpine advisories ALPINE-CVE-2026-105016

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
25 d ago

Exploit prediction

1.66% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
nuget Microsoft.Native.Quic.MsQuic.Schannel
>=2.5.11-ci.156755675, <2.5.11-ci.159417053
2.5.11-ci.159417053

Affected products

  • Microsoft .NET 10.0 runtime
  • Microsoft .NET 11.0 runtime
  • Microsoft .NET 8.0 runtime
  • Microsoft .NET 9.0 runtime
  • Microsoft Microsoft Visual Studio 2022 version 17.14
  • Microsoft Microsoft Visual Studio 2026 version 18.10
  • Microsoft Windows 11 version 23H2
  • Microsoft Windows 11 Version 24H2
  • Microsoft Windows 11 Version 25H2
  • Microsoft Windows 11 version 26H1
  • Microsoft Windows 11 Version 26H2
  • Microsoft Windows Server 2022
  • Microsoft Windows Server 2025
  • Microsoft Windows Server 2025 (Server Core installation)

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.