SB20260914145 - Fedora 44 update for dotnet8.0
Published: September 14, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 vulnerabilities.
1) Origin validation error (CVE-ID: CVE-2026-58649)
CWE-ID: CWE-346 - Origin Validation Error
CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to an origin validation error in .NET when validating origins. A remote attacker can exploit the vulnerability to disclose sensitive information.
User interaction is required. Successful exploitation could expose developer-time hot reload data, including application metadata, intermediate language updates, debugging information, method names, string literals, and file paths.
2) Improper handling of highly compressed data (CVE-ID: CVE-2026-69304)
CWE-ID: CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
CVSSv4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper handling of highly compressed data (data amplification) in ASP.NET Core when processing highly compressed data. A remote attacker can send highly compressed data to cause a denial of service.
3) Heap-based buffer overflow (CVE-ID: CVE-2026-69439)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
CVSSv4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to execute code with the privileges of the affected process.
The vulnerability exists due to a heap-based buffer overflow in .NET and Visual Studio when processing a specially crafted Portable PDB file. A remote attacker can convince a user or service to process a specially crafted Portable PDB file to execute code with the privileges of the affected process.
4) Heap-based buffer overflow (CVE-ID: CVE-2026-69522)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
CVSSv4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to a heap-based buffer overflow in Visual Studio when a user opens a specially crafted file. A remote attacker can provide a specially crafted file to execute arbitrary code.
5) Heap-based buffer overflow (CVE-ID: CVE-2026-71328)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
CVSSv4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to a heap-based buffer overflow in Visual Studio when opening a specially crafted file. A remote attacker can trick a user into opening a specially crafted file to execute arbitrary code.
User interaction is required.
Remediation
Install update from vendor's website.