CVE-2026-121394

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    CVE-2026-121394

    Published: 3 Nov 2026Last Modified: 5 Nov 2026

    Summary: FreeRDP before 3.32.2 Denial of Service via RemoteFX RLGR decoder

    Details: FreeRDP from 3.11.0 before 3.32.2 contains an assertion failure in the RemoteFX RLGR decoder that allows malicious servers to terminate clients. Attackers controlling an RDP server can send a RemoteFX tileset with RLGR code 32767, triggering a signed narrowing assertion in rfx_rlgr_decode and crashing the client.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121394.json, https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5j39-x36c-x9pm, https://nvd.nist.gov/vuln/detail/CVE-2026-121394, https://www.vulncheck.com/advisories/freerdp-before-3.32.2-denial-of-service-via-remotefx-rlgr-decoder

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 4312666c8f89cb5464fc6e79423d1d7e33683ebe
    Fixed -97eff6ddfbbfaa8e42a126d362686bd001ff8bdc

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-121394 | CVE-DB