Red Hat Enterprise Linux 9 update for .NET 8.0
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2025-21173 CVE-2025-21176 CVE-2025-21172 |
| CWE-ID | CWE-379 CWE-125 CWE-190 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
dotnet8.0 (Red Hat package) Operating systems & Components / Operating system package or component |
| Vendor | Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Creation of temporary file in directory with insecure permissions
EUVDB-ID: #VU102800
Risk: Low
CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2025-21173
CWE-ID:
CWE-379 - Creation of Temporary File in Directory with Insecure Permissions
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privilege on the target system.
The vulnerability exists due to creation of temporary file in directory with insecure permissions in .NET. A local user can overwrite arbitrary file content and gain elevated privileges on the system.
MitigationInstall updates from vendor's website.
dotnet8.0 (Red Hat package): before 8.0.112-1.el9_4
CPE2.3 External linkshttps://access.redhat.com/errata/RHSA-2025:0532
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Out-of-bounds read
EUVDB-ID: #VU102784
Risk: High
CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2025-21176
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in .NET, .NET Framework and Visual Studio. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger an out-of-bounds read error and read contents of memory on the system, leading to arbitrary code execution.
MitigationInstall updates from vendor's website.
dotnet8.0 (Red Hat package): before 8.0.112-1.el9_4
CPE2.3 External linkshttps://access.redhat.com/errata/RHSA-2025:0532
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Integer overflow
EUVDB-ID: #VU102804
Risk: Medium
CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2025-21172
CWE-ID:
CWE-190 - Integer overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer overflow in .NET and Visual Studio. A remote attacker can trick a victim to open a specially crafted file, trigger integer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
dotnet8.0 (Red Hat package): before 8.0.112-1.el9_4
CPE2.3 External linkshttps://access.redhat.com/errata/RHSA-2025:0532
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
