FreeRDP up to 3.29.x Kerberos kerberos.c kerberos_DecryptMessage out-of-bounds

Summaryinfo

A vulnerability marked as critical has been reported in FreeRDP up to 3.29.x. Affected by this vulnerability is the function kerberos_DecryptMessage of the file winpr/libwinpr/sspi/Kerberos/kerberos.c of the component Kerberos. The manipulation leads to out-of-bounds. This vulnerability is listed as CVE-2026-73242. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in FreeRDP up to 3.29.x and classified as critical. This issue affects the function kerberos_DecryptMessage of the file winpr/libwinpr/sspi/Kerberos/kerberos.c of the component Kerberos. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.30.0, FreeRDP's winpr/libwinpr/sspi/Kerberos/kerberos.c kerberos_DecryptMessage function fails to bound the peer-controlled GSS Wrap-token EC field before using it with RRC in IOV pointer offsets, allowing a malicious RDP peer to trigger out-of-bounds reads and in-place writes during CredSSP/NLA Kerberos decryption. This issue is fixed in version 3.30.0.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-73242 since 08/11/2026. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

Upgrading to version 3.30.0 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Remote Access Software

Name

• FreeRDP

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16
• 3.17
• 3.18
• 3.19
• 3.20
• 3.21
• 3.22
• 3.23
• 3.24
• 3.25
• 3.26
• 3.27
• 3.28
• 3.29

License

• open-source

Website

• Product: https://github.com/FreeRDP/FreeRDP/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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