microsoft/msquic · Security
Microsoft QUIC: Remote Code Execution Vulnerability
- GHSA ID
- GHSA-92f5-vc22-8j33
- CVE ID
- CVE-2026-62815
- Severity
- critical
- Published
- Updated
- CVSS
- 9.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS v3
- 9.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS v4
- 10 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Description
Summary
Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.
Details
New network path creations and removals triggered by incoming packets can lead to a pointer invalidation.
Patches
- Guard path promotion e0f55b5
Impact
An unauthenticated attacker could exploit this vulnerability by sending a specially crafted packet to an affected service over the network. Successful exploitation could allow the attacker to execute code on the target system. No authentication or user interaction is required.
CWEs
- CWE-416 · Use After Free
References
- https://github.com/microsoft/msquic/security/advisories/GHSA-92f5-vc22-8j33 ↗
- https://nvd.nist.gov/vuln/detail/CVE-2026-62815 ↗
- https://github.com/microsoft/msquic/pull/6217 ↗
- https://github.com/microsoft/msquic/pull/6219 ↗
- https://github.com/microsoft/msquic/pull/6220 ↗
- https://github.com/microsoft/msquic/commit/583e7d5b509bb0bfa3518482d98879b6eda41ad0 ↗
- https://github.com/microsoft/msquic/commit/9ff06b71fd4b4d5258361598ada5b24cbc1beb20 ↗
- https://github.com/microsoft/msquic/commit/e0f55b5fdc9fff0b4465976d066ebd22fb7e2b3b ↗
- https://github.com/microsoft/msquic/releases/tag/v2.4.19 ↗
- https://github.com/microsoft/msquic/releases/tag/v2.5.10 ↗
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62815 ↗
- https://github.com/advisories/GHSA-92f5-vc22-8j33 ↗