CVE-2026-105016
published 2026-10-13CVE-2026-105016: Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network.
PriorityP265critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
1.66%
76.5th percentile
Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network.
Affected
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | microsoft_visual_studio_2022_version_17.14 | >= 17.14.0 < 17.14.42 | 17.14.42 |
| microsoft | microsoft_visual_studio_2026_version_18.10 | >= 18.10.0 < 18.10.4 | 18.10.4 |
| microsoft | net_10.0_runtime | >= 10.0.0 < 10.0.14 | 10.0.14 |
| microsoft | net_11.0_runtime | >= 11.0.0 < 11.0.0-rc.2.26504.105 | 11.0.0-rc.2.26504.105 |
| microsoft | net_8.0_runtime | >= 8.0.0 < 8.0.32 | 8.0.32 |
| microsoft | net_9.0_runtime | >= 9.0.0 < 9.0.21 | 9.0.21 |
| microsoft | windows_11_version_23h2 | >= 10.0.22631.0 < 10.0.22631.7652 | 10.0.22631.7652 |
| microsoft | windows_11_version_24h2 | >= 10.0.26100.0 < 10.0.26100.9711 | 10.0.26100.9711 |
| microsoft | windows_11_version_25h2 | >= 10.0.26200.0 < 10.0.26200.9711 | 10.0.26200.9711 |
| microsoft | windows_11_version_26h1 | >= 10.0.28000.0 < 10.0.28000.3231 | 10.0.28000.3231 |
| microsoft | windows_11_version_26h2 | >= 10.0.26300.0 < 10.0.26300.9711 | 10.0.26300.9711 |
| microsoft | windows_server_2022 | >= 10.0.20348.0 < 10.0.20348.5761 | 10.0.20348.5761 |
| microsoft | windows_server_2025 | >= 10.0.26100.0 < 10.0.26100.33650 | 10.0.26100.33650 |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
ghsa9.8CRITICAL
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VulDB
Microsoft .NET/Visual Studio/Windows QUIC heap-based overflow (EUVD-2026-100459)
vuldb·2026-10-23
CVE-2026-105016 Microsoft .NET/Visual Studio/Windows QUIC heap-based overflow (EUVD-2026-100459)
A vulnerability described as very critical has been identified in Microsoft .NET, Visual Studio and Windows. Impacted is an unknown function of the component QUIC. The manipulation results in heap-based buffer overflow.
This vulnerability was named CVE-2026-105016. The attack may be performed from remote. There is no available exploit.
It is best practice to apply a patch to resolve this issue.
GHSA
Microsoft Security Advisory CVE-2026-105016 - Microsoft QUIC Remote Code Execution Vulnerability
ghsa·2026-10-13·CVSS 9.8
CVE-2026-105016 [CRITICAL] CWE-122 Microsoft Security Advisory CVE-2026-105016 - Microsoft QUIC Remote Code Execution Vulnerability
Microsoft Security Advisory CVE-2026-105016 - Microsoft QUIC Remote Code Execution Vulnerability
## Executive summary
Microsoft is releasing this security advisory to provide information about a vulnerability in Microsoft QUIC as used by .NET 8.0, .NET 9.0, .NET 10.0, and .NET 11 RC2 on Windows. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.
A crafted IPv6 QUIC packet can reach the Microsoft QUIC HTTP/3 path without authentication or user interaction and trigger remote code execution.
## Announcement
Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/446
## CVSS Details
- **Version:** 3.1
- **Severity:** Critical
- **Score:** 9.8
- **Vector:** `CVSS:3.1/AV:N/AC:L/PR:N/U
No detection rules found.
No public exploits indexed.
Hackernews
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blogs_hackernews·2026-10-19
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## ⚡ Weekly Recap: 98 Zero-Days, Rogue AI Agents, $100M Crypto Theft, 700 Supermarkets Hit and More
The worst problems don't always come with a warning. Sometimes they arrive through a service everyone trusts, a device someone bought, or a system nobody thought to check. By the time something looks wrong, the damage may already be done.
This week had plenty of that. Trusted connections became a problem. Hardware wasn't as safe as it looked. Old bugs found new victims, and some systems were left so exposed that breaking in barely required any effort. Even AI agents crossed lines they weren't supposed to.
Some attacks were cleve
Sans Isc
October 2026 Microsoft Patch Tuesday, (Tue, Oct 13th)
blogs_sans_isc·2026-10-13·CVSS 8.8
CVE-2026-96951 [HIGH] October 2026 Microsoft Patch Tuesday, (Tue, Oct 13th)
October 2026 Microsoft Patch Tuesday
Published: 2026-10-13. Last Updated: 2026-10-13 19:25:52 UTC
by Johannes Ullrich (Version: 1)
0 comment(s)
Microsoft today released patches for 1,417 vulnerabilities. 76 of these vulnerabilities are rated critical, with 7 critical vulnerabiilties requiring no customer actions. One vulnerability was disclosed before today's patch Tuesday, and one is already exploited.
CVE-2026-96951: An already exploited Windows Shell Security Feature Bypass Vulnerability. This vulnerabliity allows bypassing the "Mark of the Web" making it easier to exeucte code by sending a malicious message to a user via e-mail or instant messaging. The victim will still have to open the file.
CVE-2026-108398: This vulnerability, a .NET framework security feature bypass, could be
Qualys
Microsoft Patch Tuesday, October 2026 Security Update Review
blogs_qualys·2026-10-13
CVE-2026-96951 Microsoft Patch Tuesday, October 2026 Security Update Review
## Table of Contents
Adobe Patch for October 2026
Zero-day Vulnerabilities Patched in September Patch Tuesday Edition
Critical Severity Vulnerabilities Patched in September Patch Tuesday Edition
Other Microsoft Vulnerability Highlights
Microsoft Release Summary
Discover and Prioritize Vulnerabilities inVulnerability Management, Detection & Response (VMDR)
Rapid Response withTruRisk Eliminate
Qualys Monthly Webinar Series
Microsoft has released its October 2026 Patch Tuesday security updates, addressing vulnerabilities across its products and services. As organizations continue to navigate an evolving threat landscape, applying security patches promptly remains critical to reducing exposure and strengthening security posture. This month’s updates highlight the importance of identif
Rapid7
Patch Tuesday - October 2026
blogs_rapid7·2026-10-13·CVSS 8.8
CVE-2026-96951 [HIGH] Patch Tuesday - October 2026
Microsoft is publishing 1,413 own-product vulnerabilities on October 2026 Patch Tuesday , including 1,102 vulnerabilities in Windows. Anyone who enjoyed last month’s record-setting Patch Tuesday will love the October 2026 edition, because it’s much bigger still. As Rapid7 has noted over the course of 2026, there is every reason to suppose that vulnerability volumes will continue to rise. Microsoft is aware of exploitation in the wild for just one of the vulnerabilities published today, as well as public disclosure for two others.
## Windows Shell: zero-day security feature bypass
The Windows Shell is Microsoft’s term for the GUI interaction logic for the entire OS provided by explorer.exe and associated libraries and APIs, and for the second time this year , the Windows Shell is the site
Talos
Microsoft Patch Tuesday for October 2026 — Snort rules and prominent vulnerabilities
blogs_talos·2026-10-13·CVSS 9.8
CVE-2026-96951 [CRITICAL] Microsoft Patch Tuesday for October 2026 — Snort rules and prominent vulnerabilities
## Microsoft Patch Tuesday for October 2026 — Snort rules and prominent vulnerabilities
Microsoft has released its monthly security update for October 2026, which includes 1415 vulnerabilities affecting a range of products, including 85 that Microsoft marked as "critical."
Microsoft notes that 1 of the vulnerabilities disclosed this month have been exploited in the wild
CVE-2026-96951 is a security feature bypass vulnerability that affects Windows Shell. The shared weakness is Improper Neutralization of Special Elements used in a Command ('Command Injection'). The vulnerability has a CVSS base score of 8.8.
Out of 85 "critical" vulnerabilities, 67 are remote code execution (RCE) vulnerabilities.
Microsoft considers exploitation of the following vulnerabilities more likely.
CVE-2026-7
Crowdstrike
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Hel
Bugzilla
CVE-2026-96959 dotnet10.0: .NET: Denial of Service via unthrottled resource allocation [fedora-43]
bugzilla·2026-10-23·CVSS 8.8
CVE-2026-96959 [HIGH] CVE-2026-96959 dotnet10.0: .NET: Denial of Service via unthrottled resource allocation [fedora-43]
CVE-2026-96959 dotnet10.0: .NET: Denial of Service via unthrottled resource allocation [fedora-43]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Allocation of resources without limits or throttling in .NET allows an unauthorized attacker to deny service over a network.
Discussion:
Closing/resolving as this was fixed in https://bodhi.fedoraproject.org/updates/FEDORA-2026-c7c459ff4d
Update to .NET SDK 10.0.113 and Runtime 10.0.13
Fixes: CVE-2026-102870,CVE-2026-105016,CVE-2026-58280,CVE-2026-66822,CVE-2026-69651,CVE-2026-70007,CVE-2026-70035,CVE-2026-70159,CVE-2026-70161,CVE-2026-70162,CVE-2026-70165,CVE-2026-7
2026-10-13
Published