CVE-2026-45491
Publication date 9 June 2026
Last updated 18 June 2026
Ubuntu priority
Description
Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| dotnet8 | 26.04 LTS resolute | Not in release |
| 25.10 questing |
Fixed 8.0.128-8.0.28-0ubuntu1~25.10.1
|
|
| 24.04 LTS noble |
Fixed 8.0.128-8.0.28-0ubuntu1~24.04.1
|
|
| 22.04 LTS jammy |
Fixed 8.0.128-8.0.28-0ubuntu1~22.04.1
|
|
| 20.04 LTS focal | Not in release | |
| 18.04 LTS bionic | Not in release | |
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| dotnet9 | 26.04 LTS resolute | Not in release |
| 25.10 questing |
Fixed 9.0.118-9.0.17-0ubuntu1~25.10.1
|
|
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy | Not in release | |
| 20.04 LTS focal | Not in release | |
| 18.04 LTS bionic | Not in release | |
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| dotnet10 | 26.04 LTS resolute |
Fixed 10.0.109-10.0.9-0ubuntu1~26.04.1
|
| 25.10 questing |
Fixed 10.0.109-10.0.9-0ubuntu1~25.10.1
|
|
| 24.04 LTS noble |
Fixed 10.0.109-10.0.9-0ubuntu1~24.04.1
|
|
| 22.04 LTS jammy | Not in release | |
| 20.04 LTS focal | Not in release | |
| 18.04 LTS bionic | Not in release | |
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| dotnet6 | 26.04 LTS resolute | Not in release |
| 25.10 questing | Not in release | |
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy |
Vulnerable, fix deferred
|
|
| 20.04 LTS focal | Not in release | |
| 18.04 LTS bionic | Not in release | |
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release | |
| dotnet7 | 26.04 LTS resolute | Not in release |
| 25.10 questing | Not in release | |
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy | Ignored see notes | |
| 20.04 LTS focal | Not in release | |
| 18.04 LTS bionic | Not in release | |
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release |
Notes
iconstantin
.NET 7 is end of life upstream.
mdeslaur
Marking .NET 6 as deferred until information is available to determine if it is impacted.
Severity score breakdown
CVSS version: CVSS v3.0
Base score
6.2 · Medium
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
References
Related Ubuntu Security Notices (USN)
- USN-8420-1
- .NET vulnerabilities
- 11 June 2026