Vulnerability · Published Aug 11, 2026 · Assigned by GitHub_M
CVE-2026-73242FreeRDP: Kerberos GSS Wrap-token `EC` field is unbounded, causing an out-of-bounds decrypt in `kerberos_DecryptMessage`
High 8.3
In plain English
A high-severity heap buffer overflow in FreeRDP from FreeRDP. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | freerdp | 2:3.10.3-12.el10_2.10 | ALSA-2026:61378 |
| AlmaLinux:10 | freerdp-devel | 2:3.10.3-12.el10_2.10 | ALSA-2026:61378 |
| AlmaLinux:10 | freerdp-libs | 2:3.10.3-12.el10_2.10 | ALSA-2026:61378 |
| AlmaLinux:10 | freerdp-server | 2:3.10.3-12.el10_2.10 | ALSA-2026:61378 |
| AlmaLinux:10 | libwinpr | 2:3.10.3-12.el10_2.10 | ALSA-2026:61378 |
| AlmaLinux:10 | libwinpr-devel | 2:3.10.3-12.el10_2.10 | ALSA-2026:61378 |
| Debian:12 | freerdp2 | no fix listed | DEBIAN-CVE-2026-73242 |
| Debian:13 | freerdp3 | no fix listed | DEBIAN-CVE-2026-73242 |
| Debian:14 | freerdp3 | 3.30.0+dfsg-1 | DEBIAN-CVE-2026-73242 |
| Rocky Linux:10 | freerdp | 2:3.10.3-12.el10_2.10 | RLSA-2026:61378 |
| Ubuntu:22.04:LTS | freerdp2 | no fix listed | UBUNTU-CVE-2026-73242 |
| Ubuntu:24.04:LTS | freerdp3 | 3.30.0+dfsg-0ubuntu0.24.04.1 | UBUNTU-CVE-2026-73242 |
| Ubuntu:26.04:LTS | freerdp3 | 3.30.0+dfsg-0ubuntu0.26.04.1 | UBUNTU-CVE-2026-73242 |
Affected products (as reported)
Weakness: CWE-122 · Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
References
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-vv64-95pc-vj9v x_refsource_CONFIRM
- https://github.com/FreeRDP/FreeRDP/pull/13065 x_refsource_MISC
- https://github.com/FreeRDP/FreeRDP/commit/0adf5e30d01be84e190a359a7bdd37bc51d740cc x_refsource_MISC
- https://github.com/FreeRDP/FreeRDP/releases/tag/3.30.0 x_refsource_MISC