{"id":"CVE-2026-70186","title":"Deadlock in ASP.NET Core allows an unauthorized attacker to deny service over a network.","summary":"Deadlock in ASP.NET Core allows an unauthorized attacker to deny service over a network.","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-833"],"vendor":"Microsoft","product":"Microsoft.AspNetCore.App.Runtime.linux-arm","affected":["Microsoft.AspNetCore.App.Runtime.linux-arm >= 8.0.0, <= 8.0.31","Microsoft.AspNetCore.App.Runtime.linux-arm64 >= 8.0.0, <= 8.0.31","Microsoft.AspNetCore.App.Runtime.linux-musl-arm >= 8.0.0, <= 8.0.31","Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 >= 8.0.0, <= 8.0.31","Microsoft.AspNetCore.App.Runtime.linux-musl-x64 >= 8.0.0, <= 8.0.31","Microsoft.AspNetCore.App.Runtime.linux-x64 >= 8.0.0, <= 8.0.31","Microsoft.AspNetCore.App.Runtime.osx-arm64 >= 8.0.0, <= 8.0.31","Microsoft.AspNetCore.App.Runtime.osx-x64 >= 8.0.0, <= 8.0.31","Microsoft.AspNetCore.App.Runtime.win-arm64 >= 8.0.0, <= 8.0.31","Microsoft.AspNetCore.App.Runtime.win-x64 >= 8.0.0, <= 8.0.31","Microsoft.AspNetCore.App.Runtime.win-x86 >= 8.0.0, <= 8.0.31","Microsoft.AspNetCore.App.Runtime.linux-arm >= 10.0.0, <= 10.0.12","Microsoft.AspNetCore.App.Runtime.linux-arm64 >= 10.0.0, <= 10.0.12","Microsoft.AspNetCore.App.Runtime.linux-musl-arm >= 10.0.0, <= 10.0.12","Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 >= 10.0.0, <= 10.0.12","Microsoft.AspNetCore.App.Runtime.linux-musl-x64 >= 10.0.0, <= 10.0.12","Microsoft.AspNetCore.App.Runtime.linux-x64 >= 10.0.0, <= 10.0.12","Microsoft.AspNetCore.App.Runtime.osx-arm64 >= 10.0.0, <= 10.0.12","Microsoft.AspNetCore.App.Runtime.osx-x64 >= 10.0.0, <= 10.0.12","Microsoft.AspNetCore.App.Runtime.win-arm64 >= 10.0.0, <= 10.0.12","Microsoft.AspNetCore.App.Runtime.win-x64 >= 10.0.0, <= 10.0.12","Microsoft.AspNetCore.App.Runtime.win-x86 >= 10.0.0, <= 10.0.12","Microsoft.AspNetCore.App.Runtime.linux-arm >= 9.0.0, <= 9.0.20","Microsoft.AspNetCore.App.Runtime.linux-arm64 >= 9.0.0, <= 9.0.20","Microsoft.AspNetCore.App.Runtime.linux-musl-arm >= 9.0.0, <= 9.0.20","Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 >= 9.0.0, <= 9.0.20","Microsoft.AspNetCore.App.Runtime.linux-musl-x64 >= 9.0.0, <= 9.0.20","Microsoft.AspNetCore.App.Runtime.linux-x64 >= 9.0.0, <= 9.0.20","Microsoft.AspNetCore.App.Runtime.osx-arm64 >= 9.0.0, <= 9.0.20","Microsoft.AspNetCore.App.Runtime.osx-x64 >= 9.0.0, <= 9.0.20","Microsoft.AspNetCore.App.Runtime.win-arm64 >= 9.0.0, <= 9.0.20","Microsoft.AspNetCore.App.Runtime.win-x64 >= 9.0.0, <= 9.0.20","Microsoft.AspNetCore.App.Runtime.win-x86 >= 9.0.0, <= 9.0.20"],"patched":["Microsoft.AspNetCore.App.Runtime.linux-arm 8.0.32","Microsoft.AspNetCore.App.Runtime.linux-arm64 8.0.32","Microsoft.AspNetCore.App.Runtime.linux-musl-arm 8.0.32","Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 8.0.32","Microsoft.AspNetCore.App.Runtime.linux-musl-x64 8.0.32","Microsoft.AspNetCore.App.Runtime.linux-x64 8.0.32","Microsoft.AspNetCore.App.Runtime.osx-arm64 8.0.32","Microsoft.AspNetCore.App.Runtime.osx-x64 8.0.32","Microsoft.AspNetCore.App.Runtime.win-arm64 8.0.32","Microsoft.AspNetCore.App.Runtime.win-x64 8.0.32","Microsoft.AspNetCore.App.Runtime.win-x86 8.0.32","Microsoft.AspNetCore.App.Runtime.linux-arm 10.0.13","Microsoft.AspNetCore.App.Runtime.linux-arm64 10.0.13","Microsoft.AspNetCore.App.Runtime.linux-musl-arm 10.0.13","Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 10.0.13","Microsoft.AspNetCore.App.Runtime.linux-musl-x64 10.0.13","Microsoft.AspNetCore.App.Runtime.linux-x64 10.0.13","Microsoft.AspNetCore.App.Runtime.osx-arm64 10.0.13","Microsoft.AspNetCore.App.Runtime.osx-x64 10.0.13","Microsoft.AspNetCore.App.Runtime.win-arm64 10.0.13","Microsoft.AspNetCore.App.Runtime.win-x64 10.0.13","Microsoft.AspNetCore.App.Runtime.win-x86 10.0.13","Microsoft.AspNetCore.App.Runtime.linux-arm 9.0.21","Microsoft.AspNetCore.App.Runtime.linux-arm64 9.0.21","Microsoft.AspNetCore.App.Runtime.linux-musl-arm 9.0.21","Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 9.0.21","Microsoft.AspNetCore.App.Runtime.linux-musl-x64 9.0.21","Microsoft.AspNetCore.App.Runtime.linux-x64 9.0.21","Microsoft.AspNetCore.App.Runtime.osx-arm64 9.0.21","Microsoft.AspNetCore.App.Runtime.osx-x64 9.0.21","Microsoft.AspNetCore.App.Runtime.win-arm64 9.0.21","Microsoft.AspNetCore.App.Runtime.win-x64 9.0.21","Microsoft.AspNetCore.App.Runtime.win-x86 9.0.21"],"published":"2026-10-13","updated":"2026-10-13","sourceUpdated":"2026-10-13T23:17:59.340","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-70186","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70186","label":"secure@microsoft.com"},{"url":"https://github.com/dotnet/aspnetcore/security/advisories/GHSA-mf4x-w4gh-4656"},{"url":"https://github.com/dotnet/announcements/issues/461"},{"url":"https://github.com/dotnet/aspnetcore/discussions/69797"},{"url":"https://github.com/advisories/GHSA-mf4x-w4gh-4656"}],"tags":["nvd","ghsa","nuget"],"aliases":["GHSA-mf4x-w4gh-4656"],"ecosystem":"nuget","ingestedAt":"2026-10-13T19:43:29.022Z","slug":"CVE-2026-70186","body":"## Overview\n\nDeadlock in ASP.NET Core allows an unauthorized attacker to deny service over a network.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-70186)\n\nAffected packages:\n\n- `Microsoft.AspNetCore.App.Runtime.linux-arm >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm64 >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-x64 >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.linux-x64 >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.osx-arm64 >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.osx-x64 >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.win-arm64 >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.win-x64 >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.win-x86 >= 8.0.0, <= 8.0.31`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm64 >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-x64 >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.linux-x64 >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.osx-arm64 >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.osx-x64 >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.win-arm64 >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.win-x64 >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.win-x86 >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm >= 9.0.0, <= 9.0.20`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm64 >= 9.0.0, <= 9.0.20`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm >= 9.0.0, <= 9.0.20`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 >= 9.0.0, <= 9.0.20`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-x64 >= 9.0.0, <= 9.0.20`\n- `Microsoft.AspNetCore.App.Runtime.linux-x64 >= 9.0.0, <= 9.0.20`\n- `Microsoft.AspNetCore.App.Runtime.osx-arm64 >= 9.0.0, <= 9.0.20`\n- `Microsoft.AspNetCore.App.Runtime.osx-x64 >= 9.0.0, <= 9.0.20`\n- `Microsoft.AspNetCore.App.Runtime.win-arm64 >= 9.0.0, <= 9.0.20`\n- `Microsoft.AspNetCore.App.Runtime.win-x64 >= 9.0.0, <= 9.0.20`\n- `Microsoft.AspNetCore.App.Runtime.win-x86 >= 9.0.0, <= 9.0.20`\n\nPatched in:\n\n- `Microsoft.AspNetCore.App.Runtime.linux-arm 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm64 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-x64 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.linux-x64 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.osx-arm64 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.osx-x64 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.win-arm64 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.win-x64 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.win-x86 8.0.32`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm64 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-x64 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.linux-x64 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.osx-arm64 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.osx-x64 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.win-arm64 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.win-x64 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.win-x86 10.0.13`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm 9.0.21`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm64 9.0.21`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm 9.0.21`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 9.0.21`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-x64 9.0.21`\n- `Microsoft.AspNetCore.App.Runtime.linux-x64 9.0.21`\n- `Microsoft.AspNetCore.App.Runtime.osx-arm64 9.0.21`\n- `Microsoft.AspNetCore.App.Runtime.osx-x64 9.0.21`\n- `Microsoft.AspNetCore.App.Runtime.win-arm64 9.0.21`\n- `Microsoft.AspNetCore.App.Runtime.win-x64 9.0.21`\n- `Microsoft.AspNetCore.App.Runtime.win-x86 9.0.21`\n\nSource: https://github.com/advisories/GHSA-mf4x-w4gh-4656","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}