CVE-2025-55315

Publication date 14 October 2025

Last updated 16 October 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.9 · Critical

Score breakdown

Description

Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an authorized attacker to bypass a security feature over a network.

Read the notes from the security team

Status

Package Ubuntu Release Status
dotnet6 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy
Needs evaluation
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 25.10 questing Not in release
25.04 plucky 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
dotnet8 25.10 questing
Fixed 8.0.121-8.0.21-0ubuntu1~25.10.1
25.04 plucky
Fixed 8.0.121-8.0.21-0ubuntu1~25.04.1
24.04 LTS noble
Fixed 8.0.121-8.0.21-0ubuntu1~24.04.1
22.04 LTS jammy
Fixed 8.0.121-8.0.21-0ubuntu1~22.04.1
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 25.10 questing
Fixed 9.0.111-9.0.10-0ubuntu1~25.10.1
25.04 plucky
Fixed 9.0.111-9.0.10-0ubuntu1~25.04.1
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 25.10 questing
Fixed 10.0.100-10.0.0~rc2-0ubuntu1~25.10.2
25.04 plucky Not in release
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

Notes

iconstantin

.NET 7 is end of life upstream.

Severity score breakdown

Parameter Value
Base score 9.9 · Critical
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Changed
Confidentiality High
Integrity impact High
Availability impact Low
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

References

Related Ubuntu Security Notices (USN)

Other references