--- id: CVE-2026-62909 title: .NET Elevation of Privilege Vulnerability summary: >- Uncaught exception in .NET allows an authorized attacker to elevate privileges locally. severity: high cvss: 7.8 cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C' cvssSource: cna cwe: - CWE-252 - CWE-248 vendor: Microsoft product: .NET 10.0 runtime affected: - .net_10.0_runtime >= 10.0.0 < 10.0.11 - .net_8.0_runtime >= 8.0.0 < 8.0.30 - .net_9.0_runtime >= 9.0.0 < 9.0.19 - visual_studio_2022_version_17.14 >= 17.14.0 < 17.14.38 - visual_studio_2026_version_18.8 >= 18.0 < 18.8.3 ssvc: exploitation: none automatable: 'no' technicalImpact: total timestamp: '2026-08-12T03:55:32.907064Z' published: '2026-08-11' updated: '2026-10-28' sourceUpdated: '2026-10-28T20:06:02.641Z' source: CVEORG sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-62909' references: - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62909' label: .NET Elevation of Privilege Vulnerability - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-62909.json - url: 'https://access.redhat.com/security/cve/CVE-2026-62909' - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2512185' - url: 'https://www.cve.org/CVERecord?id=CVE-2026-62909' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-62909' - url: 'https://access.redhat.com/errata/RHSA-2026:58566' - url: 'https://access.redhat.com/errata/RHSA-2026:58567' - url: 'https://access.redhat.com/errata/RHSA-2026:55858' - url: 'https://access.redhat.com/errata/RHSA-2026:54541' - url: 'https://access.redhat.com/errata/RHSA-2026:54590' - url: 'https://access.redhat.com/errata/RHSA-2026:54542' - url: 'https://access.redhat.com/errata/RHSA-2026:54538' - url: 'https://access.redhat.com/errata/RHSA-2026:54550' - url: 'https://access.redhat.com/errata/RHSA-2026:58568' - url: 'https://access.redhat.com/errata/RHSA-2026:58569' - url: 'https://access.redhat.com/errata/RHSA-2026:58570' - url: 'https://access.redhat.com/errata/RHSA-2026:55857' - url: 'https://access.redhat.com/errata/RHSA-2026:54574' - url: 'https://access.redhat.com/errata/RHSA-2026:55856' - url: 'https://access.redhat.com/errata/RHSA-2026:55142' - url: 'https://access.redhat.com/errata/RHSA-2026:55405' - url: 'https://access.redhat.com/errata/RHSA-2026:44914' - url: 'https://github.com/dotnet/runtime/security/advisories/GHSA-9mr8-pwpw-3j2w' - url: 'https://github.com/dotnet/announcements/issues/429' - url: 'https://github.com/advisories/GHSA-9mr8-pwpw-3j2w' tags: - cve.org - csaf - vex - red-hat - ghsa - nuget epss: 0.00264 epssPercentile: 0.18251 aliases: - GHSA-9mr8-pwpw-3j2w ecosystem: nuget patched: - enterprise_linux_appstream_eus_v_10_0 - enterprise_linux_appstream_v_10 - enterprise_linux_appstream_v_8 - enterprise_linux_appstream_e4s_v_9_4 - enterprise_linux_appstream_eus_v_9_6 - enterprise_linux_appstream_v_9 - enterprise_linux_codeready_linux_builder_eus_v_10_0 - enterprise_linux_codeready_linux_builder_v_10 - enterprise_linux_crb_v_8 - codeready_linux_builder_eus_v_9_6 - enterprise_linux_codeready_linux_builder_v_9 - hardened_images scores: cna: 7.8 vendor: 7.8 ghsa: 6.7 ingestedAt: '2026-08-11T19:48:29.039Z' --- ## Overview Uncaught exception in .NET allows an authorized attacker to elevate privileges locally. ## Affected - `.net_10.0_runtime >= 10.0.0 < 10.0.11` - `.net_8.0_runtime >= 8.0.0 < 8.0.30` - `.net_9.0_runtime >= 9.0.0 < 9.0.19` - `visual_studio_2022_version_17.14 >= 17.14.0 < 17.14.38` - `visual_studio_2026_version_18.8 >= 18.0 < 18.8.3` ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges. ## Package advisory (CVE-2026-62909) Affected packages: - `Microsoft.NETCore.App.Runtime.linux-arm >= 10.0.0, <= 10.0.10` - `Microsoft.NETCore.App.Runtime.linux-arm64 >= 10.0.0, <= 10.0.10` - `Microsoft.NETCore.App.Runtime.linux-musl-arm >= 10.0.0, <= 10.0.10` - `Microsoft.NETCore.App.Runtime.linux-musl-arm64 >= 10.0.0, <= 10.0.10` - `Microsoft.NETCore.App.Runtime.linux-musl-x64 >= 10.0.0, <= 10.0.10` - `Microsoft.NETCore.App.Runtime.linux-x64 >= 10.0.0, <= 10.0.10` - `Microsoft.NETCore.App.Runtime.osx-arm64 >= 10.0.0, <= 10.0.10` - `Microsoft.NETCore.App.Runtime.osx-x64 >= 10.0.0, <= 10.0.10` - `Microsoft.NETCore.App.Runtime.linux-arm >= 9.0.0, <= 9.0.18` - `Microsoft.NETCore.App.Runtime.linux-arm64 >= 9.0.0, <= 9.0.18` - `Microsoft.NETCore.App.Runtime.linux-musl-arm >= 9.0.0, <= 9.0.18` - `Microsoft.NETCore.App.Runtime.linux-musl-arm64 >= 9.0.0, <= 9.0.18` - `Microsoft.NETCore.App.Runtime.linux-musl-x64 >= 9.0.0, <= 9.0.18` - `Microsoft.NETCore.App.Runtime.linux-x64 >= 9.0.0, <= 9.0.18` - `Microsoft.NETCore.App.Runtime.osx-arm64 >= 9.0.0, <= 9.0.18` - `Microsoft.NETCore.App.Runtime.osx-x64 >= 9.0.0, <= 9.0.18` - `Microsoft.NETCore.App.Runtime.linux-arm >= 8.0.0, <= 8.0.29` - `Microsoft.NETCore.App.Runtime.linux-arm64 >= 8.0.0, <= 8.0.29` - `Microsoft.NETCore.App.Runtime.linux-musl-arm >= 8.0.0, <= 8.0.29` - `Microsoft.NETCore.App.Runtime.linux-musl-arm64 >= 8.0.0, <= 8.0.29` - `Microsoft.NETCore.App.Runtime.linux-musl-x64 >= 8.0.0, <= 8.0.29` - `Microsoft.NETCore.App.Runtime.linux-x64 >= 8.0.0, <= 8.0.29` - `Microsoft.NETCore.App.Runtime.osx-arm64 >= 8.0.0, <= 8.0.29` - `Microsoft.NETCore.App.Runtime.osx-x64 >= 8.0.0, <= 8.0.29` Patched in: - `Microsoft.NETCore.App.Runtime.linux-arm 10.0.11` - `Microsoft.NETCore.App.Runtime.linux-arm64 10.0.11` - `Microsoft.NETCore.App.Runtime.linux-musl-arm 10.0.11` - `Microsoft.NETCore.App.Runtime.linux-musl-arm64 10.0.11` - `Microsoft.NETCore.App.Runtime.linux-musl-x64 10.0.11` - `Microsoft.NETCore.App.Runtime.linux-x64 10.0.11` - `Microsoft.NETCore.App.Runtime.osx-arm64 10.0.11` - `Microsoft.NETCore.App.Runtime.osx-x64 10.0.11` - `Microsoft.NETCore.App.Runtime.linux-arm 9.0.19` - `Microsoft.NETCore.App.Runtime.linux-arm64 9.0.19` - `Microsoft.NETCore.App.Runtime.linux-musl-arm 9.0.19` - `Microsoft.NETCore.App.Runtime.linux-musl-arm64 9.0.19` - `Microsoft.NETCore.App.Runtime.linux-musl-x64 9.0.19` - `Microsoft.NETCore.App.Runtime.linux-x64 9.0.19` - `Microsoft.NETCore.App.Runtime.osx-arm64 9.0.19` - `Microsoft.NETCore.App.Runtime.osx-x64 9.0.19` - `Microsoft.NETCore.App.Runtime.linux-arm 8.0.30` - `Microsoft.NETCore.App.Runtime.linux-arm64 8.0.30` - `Microsoft.NETCore.App.Runtime.linux-musl-arm 8.0.30` - `Microsoft.NETCore.App.Runtime.linux-musl-arm64 8.0.30` - `Microsoft.NETCore.App.Runtime.linux-musl-x64 8.0.30` - `Microsoft.NETCore.App.Runtime.linux-x64 8.0.30` - `Microsoft.NETCore.App.Runtime.osx-arm64 8.0.30` - `Microsoft.NETCore.App.Runtime.osx-x64 8.0.30` Source: https://github.com/advisories/GHSA-9mr8-pwpw-3j2w ## Vendor advisories - **RHSA-2026:58566** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) · released 2026-08-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:58566) - **RHSA-2026:58567** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) · released 2026-08-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:58567) - **RHSA-2026:55858** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-08-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:55858) - **RHSA-2026:54541** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-08-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:54541) - **RHSA-2026:54590** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-08-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:54590) - **RHSA-2026:54542** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-08-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:54542) - **RHSA-2026:54538** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-08-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:54538) - **RHSA-2026:54550** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-08-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:54550) - **RHSA-2026:58568** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.4) · released 2026-08-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:58568) - **RHSA-2026:58569** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat CodeReady Linux Builder EUS (v.9.6) · released 2026-08-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:58569) - **RHSA-2026:58570** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat CodeReady Linux Builder EUS (v.9.6) · released 2026-08-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:58570)