Vulnerability · CVE-2026-57108
Microsoft Security Advisory CVE-2026-57108 – .NET Denial of Service Vulnerability
Published Jul 20, 2026 · catalog updated Nov 4, 2026 · Microsoft Security Advisory –
Last checked Nov 8, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2026-57108. EPSS is 1.17%. Act only if a listed version of Microsoft Security Advisory – is installed.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (Microsoft Security Advisory –).
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- High7.5
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 1.17%
- Remediation
- Advisory link
- Affected products
- NuGet Microsoft.NetCore.App.Runtime.linux-arm · NuGet Microsoft.NetCore.App.Runtime.linux-arm64 · NuGet Microsoft.NetCore.App.Runtime.linux-musl-arm · NuGet Microsoft.NetCore.App.Runtime.linux-musl-arm64 · NuGet Microsoft.NetCore.App.Runtime.linux-musl-x64 · NuGet Microsoft.NetCore.App.Runtime.linux-x64
## Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in the .NET runtime cryptography layer (CryptoNative_GetX509NameInfo). This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A denial of service vulnerability exists in the .NET 8, .NET 9, and .NET 10 runtime when parsing X.509 certificates. A specially crafted certificate could allow an attacker to cause a denial of service. ## Announcement Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/408 ## CVSS Details - **Version:** 3.1 - **Severity:** High - **Score:** 7.5 - **Vector:** - **Weakness:** CWE-843 (Access of Resource Using Incompatible Type ('Type Confusion')) ## Affected Platforms - **Platforms:** Linux, macOS - **Architectures:** All ## Affected Packages The vulnerability affects any Microsoft .NET project if it uses any of affected package versions listed below ### .NET 10.0 Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- [Microsoft.NetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm) | >= 10.0.0, = 10.0.0, = 10.0.0, = 10.0.0, = 10.0.0, = 10.0.0, = 10.0.0, = 10.0.0, .NET 9.0 Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- [Microsoft.NetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm) | >= 9.0.0, = 9.0.0, = 9.0.0, = 9.0.0, = 9.0.0, = 9.0.0, = 9.0.0, = 9.0.0, .NET 8.0 Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- [Microsoft.NetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm) | >= 8.0.0, = 8.0.0, = 8.0.0, = 8.0.0, = 8.0.0, = 8.0.0, = 8.0.0, = 8.0.0, How do I know if I am affected? If using a package listed in
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- NuGet Microsoft.NetCore.App.Runtime.linux-arm10.0.0 → 10.0.10
- NuGet Microsoft.NetCore.App.Runtime.linux-arm9.0.0 → 9.0.18
- NuGet Microsoft.NetCore.App.Runtime.linux-arm6410.0.0 → 10.0.10
- NuGet Microsoft.NetCore.App.Runtime.linux-arm649.0.0 → 9.0.18
- NuGet Microsoft.NetCore.App.Runtime.linux-musl-arm10.0.0 → 10.0.10
- NuGet Microsoft.NetCore.App.Runtime.linux-musl-arm9.0.0 → 9.0.18
- NuGet Microsoft.NetCore.App.Runtime.linux-musl-arm6410.0.0 → 10.0.10
- NuGet Microsoft.NetCore.App.Runtime.linux-musl-arm649.0.0 → 9.0.18
- NuGet Microsoft.NetCore.App.Runtime.linux-musl-x6410.0.0 → 10.0.10
- NuGet Microsoft.NetCore.App.Runtime.linux-x6410.0.0 → 10.0.10
- NuGet Microsoft.NetCore.App.Runtime.osx-arm6410.0.0 → 10.0.10
- NuGet Microsoft.NetCore.App.Runtime.osx-x6410.0.0 → 10.0.10
How to fix CVE-2026-57108
Upgrade
CVE-2026-57108 lists a fix boundary at 10.0.10. Compare the installed build with that boundary before you change production.
Version check
Seen in 10.0.0 → 10.0.10 · 5 other packages on the advisory
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-57108. EPSS is 1.17%. Act only if a listed version of Microsoft Security Advisory – is installed.
Which versions are affected?
Compare what you have installed with Microsoft.NetCore.App.Runtime.linux-arm 10.0.0 → 10.0.10; Microsoft.NetCore.App.Runtime.linux-arm 9.0.0 → 9.0.18; Microsoft.NetCore.App.Runtime.linux-arm64 10.0.0 → 10.0.10; Microsoft.NetCore.App.Runtime.linux-arm64 9.0.0 → 9.0.18. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-843: Access of Resource Using Incompatible Type (Type Confusion). EPSS 1.17%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Jul 20, 2026 · GitHub Advisory Database
Detected
## Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in the .NET runtime cryptography layer (CryptoNative_GetX509NameInfo). This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A denial of service vulnerability exists in the .NET 8, .NET 9, and .NET 10 runtime when parsin
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.linux-arm fixed in 10.0.10; Microsoft.NetCore.App.Runtime.linux-arm64 fixed in 10.0.10; Microsoft.NetCore.App.Runtime.linux-musl-arm fixed in 10.0.10; Microsoft.NetCore.App.Runtime.linux-musl-arm64 fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.linux-arm fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.linux-arm64 fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.linux-musl-arm fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.linux-musl-arm64 fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.linux-musl-x64 fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.linux-x64 fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.osx-arm64 fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.osx-x64 fixed in 10.0.10
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.linux-arm fixed in 9.0.18
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.linux-arm64 fixed in 9.0.18
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.linux-musl-arm fixed in 9.0.18
Nov 4, 2026 · GitHub Advisory Database
Fix available
Microsoft.NetCore.App.Runtime.linux-musl-arm64 fixed in 9.0.18
Nov 4, 2026 · GitHub Advisory Database
Updated
## Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in the .NET runtime cryptography layer (CryptoNative_GetX509NameInfo). This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A denial of service vulnerability exists in the .NET 8, .NET 9, and .NET 10 runtime when parsin
Sources
- CVE.orgVulnerability recordCVE-2026-57108
Official CVE identifier
cve.org - GitHub Advisory DatabasePackage advisoryGHSA-rp2p-6cmp-jxj9
GitHub Advisory Database record mirrored by OSV.
github.com - OpenSSF OSV / OSV ScannerPackage advisoryGHSA-rp2p-6cmp-jxj9
Microsoft Security Advisory CVE-2026-57108 – .NET Denial of Service Vulnerability
osv.dev
References
Freshness
Last verified in this catalog Nov 7, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- GitHub Advisory DatabaseNov 8, 2026
- OpenSSF OSV / OSV ScannerNov 8, 2026
- CVE.orgNov 4, 2026