Debian dla-4890 : libsrt-doc - security update

critical Nessus Plugin ID 378540

Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4890 advisory.

- ------------------------------------------------------------------------- Debian LTS Advisory DLA-4890-1 [email protected] https://www.debian.org/lts/security/ Simon Quigley November 10, 2026 https://wiki.debian.org/LTS
- -------------------------------------------------------------------------

Package : srt Version : 1.5.1-1+deb12u2 CVE ID : CVE-2026-55868 CVE-2026-55869

srt is a latency-aware UDP streaming library. Programs that send or receive live video over the Secure Reliable Transport (SRT) protocol use it.

A remote attacker who can reach an SRT socket can crash the process using that socket. When the socket is carrying an encrypted stream, that attacker can also make the receiver accept clear packets, so the live stream can be replaced or interrupted.

CVE-2026-55868

A keying-material request (KMREQ) that failed to install a key moved an already secured receiver into a failed encryption state.
A clear data packet was then stored for playback.

CVE-2026-55869

A KMREQ or keying-material response (KMRSP) control packet was copied into a fixed-size stack buffer using the length carried in the packet. An oversized packet writes past the end of that buffer.

For Debian 12 bookworm, these problems have been fixed in version 1.5.1-1+deb12u2.

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 LTS security advisories, how to apply these updates to your system, and frequently asked questions can be found at: https://wiki.debian.org/LTS

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.

Solution

Upgrade the libsrt-doc packages.

Plugin Details

Severity: Critical

ID: 378540

File Name: debian_DLA-4890.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 11/10/2026

Updated: 11/10/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.39

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:P

CVSS Score Source: CVE-2026-55869

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:12.0, p-cpe:/a:debian:debian_linux:libsrt-doc, p-cpe:/a:debian:debian_linux:libsrt-gnutls-dev, p-cpe:/a:debian:debian_linux:libsrt-openssl-dev, p-cpe:/a:debian:debian_linux:libsrt1.5-gnutls, p-cpe:/a:debian:debian_linux:libsrt1.5-openssl, p-cpe:/a:debian:debian_linux:srt-tools

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 11/10/2026

Vulnerability Publication Date: 7/21/2026

Reference Information

CVE: CVE-2026-55868, CVE-2026-55869

Detections

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