Debian Linux - srt - None

Ubuntu Linux - [Encryption State Machine Downgrade]

The remote Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8764-1 advisory.

    It was discovered that SRT did not authenticate certain encryption control messages. A remote attacker     could possibly use this issue to downgrade an encrypted connection and inject arbitrary content or     interrupt a media stream. (CVE-2026-55868)

    It was discovered that SRT did not properly validate certain control packets during connection setup and     key refresh operations. A remote attacker could possibly use this issue to cause SRT to crash, resulting     in a denial of service. (CVE-2026-55869)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6450 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6450-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     August 18, 2026                       https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : srt     CVE ID         : CVE-2026-55868 CVE-2026-55869

    Two security vulnerabilities were discovered in SRT, a latency-aware UDP     streaming library, which could result in denial of service or encryption     bypass.

    For the stable distribution (trixie), these problems have been fixed in     version 1.5.4-1+deb13u1.

    We recommend that you upgrade your srt packages.

    For the detailed security status of srt please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/srt

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - The SRT project reports: (CVE-2026-55868)

Note that Nessus relies on the presence of the package as reported by the vendor.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 037b7b00-84d4-11f1-8f76-345a6001a2f9 advisory.

    The SRT project reports:

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
346232	Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : SRT vulnerabilities (USN-8764-1)	Nessus	Ubuntu Local Security Checks	Local	critical
337865	Debian dsa-6450 : libsrt-doc - security update	Nessus	Debian Local Security Checks	Local	critical
329622	Linux Distros Unpatched Vulnerability : CVE-2026-55868	Nessus	Misc.	Local	critical
328867	FreeBSD : srt -- Multiple vulnerabilities (037b7b00-84d4-11f1-8f76-345a6001a2f9)	Nessus	FreeBSD Local Security Checks	Local	critical

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CVE-2026-55868

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