CVE-2026-121398

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    CVE-2026-121398

    Published: 3 Nov 2026Last Modified: 5 Nov 2026

    Summary: FreeRDP before 3.32.2 Use-After-Free via dyn-channel-dump Module

    Details: FreeRDP before 3.32.2 contains a cross-thread use-after-free vulnerability in the freerdp-proxy dyn-channel-dump module during session teardown. A malicious RDP target can send dynamic channel data while the front client disconnects, letting the client thread read freed ChannelData and crash the proxy process.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121398.json, https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-v3q2-qjvf-7rqw, https://nvd.nist.gov/vuln/detail/CVE-2026-121398, https://www.vulncheck.com/advisories/freerdp-before-3.32.2-use-after-free-via-dyn-channel-dump-module

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -97eff6ddfbbfaa8e42a126d362686bd001ff8bdc

    Affected versions

    3.5.1
    3.5.0

    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-2026-121398 | CVE-DB