A NULL pointer dereference flaw in Linux kernel versions prior to 5.11 may be seen if sco_sock_getsockopt function in net/bluetooth/sco.c do not have a sanity check for a socket connection, when using BT_SNDMTU/BT_RCVMTU for SCO sockets. This could allow a local attacker with a special user privilege to crash the system (DOS) or leak kernel internal information.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-414665 advisory.

    A NULL pointer dereference flaw in Linux kernel versions prior to 5.11 may be seen if sco_sock_getsockopt     function in net/bluetooth/sco.c do not have a sanity check for a socket connection, when using     BT_SNDMTU/BT_RCVMTU for SCO sockets. This could allow a local attacker with a special user privilege to     crash the system (DOS) or leak kernel internal information.

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

Note that Nessus has not tested for this issue 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.

  - A NULL pointer dereference flaw in Linux kernel versions prior to 5.11 may be seen if sco_sock_getsockopt     function in net/bluetooth/sco.c do not have a sanity check for a socket connection, when using     BT_SNDMTU/BT_RCVMTU for SCO sockets. This could allow a local attacker with a special user privilege to     crash the system (DOS) or leak kernel internal information. (CVE-2020-35499)

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

An update of the linux package has been released.

ID	Name	Product	Family	Severity
267449	Unity Linux 20.1070e Security Update: kernel (UTSA-2025-414665)	Nessus	Unity Linux Local Security Checks	medium
249401	Linux Distros Unpatched Vulnerability : CVE-2020-35499	Nessus	Misc.	medium
148350	Photon OS 4.0: Linux PHSA-2021-4.0-0007	Nessus	PhotonOS Local Security Checks	high

Detections

Analytics

CVE-2020-35499

medium

Tenable Plugins

medium

medium

high